content/browser/storage_partition_impl_map.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/storage_partition_impl_map.h"
   6
   7 #include "base/bind.h"
   8 #include "base/callback.h"
   9 #include "base/files/file_enumerator.h"
  10 #include "base/files/file_path.h"
  11 #include "base/files/file_util.h"
  12 #include "base/stl_util.h"
  13 #include "base/strings/string_number_conversions.h"
  14 #include "base/strings/string_util.h"
  15 #include "base/strings/stringprintf.h"
  16 #include "base/threading/sequenced_worker_pool.h"
  17 #include "content/browser/appcache/appcache_interceptor.h"
  18 #include "content/browser/appcache/chrome_appcache_service.h"
  19 #include "content/browser/fileapi/browser_file_system_helper.h"
  20 #include "content/browser/fileapi/chrome_blob_storage_context.h"
  21 #include "content/browser/loader/resource_request_info_impl.h"
  22 #include "content/browser/resource_context_impl.h"
  23 #include "content/browser/service_worker/service_worker_request_handler.h"
  24 #include "content/browser/storage_partition_impl.h"
  25 #include "content/browser/streams/stream.h"
  26 #include "content/browser/streams/stream_context.h"
  27 #include "content/browser/streams/stream_registry.h"
  28 #include "content/browser/streams/stream_url_request_job.h"
  29 #include "content/browser/webui/url_data_manager_backend.h"
  30 #include "content/public/browser/browser_context.h"
  31 #include "content/public/browser/browser_thread.h"
  32 #include "content/public/browser/content_browser_client.h"
  33 #include "content/public/browser/navigator_connect_context.h"
  34 #include "content/public/browser/navigator_connect_service_factory.h"
  35 #include "content/public/browser/storage_partition.h"
  36 #include "content/public/common/content_constants.h"
  37 #include "content/public/common/url_constants.h"
  38 #include "crypto/sha2.h"
  39 #include "net/url_request/url_request_context.h"
  40 #include "net/url_request/url_request_context_getter.h"
  41 #include "storage/browser/blob/blob_storage_context.h"
  42 #include "storage/browser/blob/blob_url_request_job_factory.h"
  43 #include "storage/browser/fileapi/file_system_url_request_job_factory.h"
  44
  45 using storage::FileSystemContext;
  46 using storage::BlobStorageContext;
  47
  48 namespace content {
  49
  50 namespace {
  51
  52 // A derivative that knows about Streams too.
  53 class BlobProtocolHandler : public net::URLRequestJobFactory::ProtocolHandler {
  54  public:
  55   BlobProtocolHandler(ChromeBlobStorageContext* blob_storage_context,
  56                       StreamContext* stream_context,
  57                       storage::FileSystemContext* file_system_context)
  58       : blob_storage_context_(blob_storage_context),
  59         stream_context_(stream_context),
  60         file_system_context_(file_system_context) {}
  61
  62   ~BlobProtocolHandler() override {}
  63
  64   net::URLRequestJob* MaybeCreateJob(
  65       net::URLRequest* request,
  66       net::NetworkDelegate* network_delegate) const override {
  67     scoped_refptr<Stream> stream =
  68         stream_context_->registry()->GetStream(request->url());
  69     if (stream.get())
  70       return new StreamURLRequestJob(request, network_delegate, stream);
  71
  72     if (!blob_protocol_handler_) {
  73       // Construction is deferred because 'this' is constructed on
  74       // the main thread but we want blob_protocol_handler_ constructed
  75       // on the IO thread.
  76       blob_protocol_handler_.reset(new storage::BlobProtocolHandler(
  77           blob_storage_context_->context(),
  78           file_system_context_.get(),
  79           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE)
  80               .get()));
  81     }
  82     return blob_protocol_handler_->MaybeCreateJob(request, network_delegate);
  83   }
  84
  85  private:
  86   const scoped_refptr<ChromeBlobStorageContext> blob_storage_context_;
  87   const scoped_refptr<StreamContext> stream_context_;
  88   const scoped_refptr<storage::FileSystemContext> file_system_context_;
  89   mutable scoped_ptr<storage::BlobProtocolHandler> blob_protocol_handler_;
  90   DISALLOW_COPY_AND_ASSIGN(BlobProtocolHandler);
  91 };
  92
  93 // These constants are used to create the directory structure under the profile
  94 // where renderers with a non-default storage partition keep their persistent
  95 // state. This will contain a set of directories that partially mirror the
  96 // directory structure of BrowserContext::GetPath().
  97 //
  98 // The kStoragePartitionDirname contains an extensions directory which is
  99 // further partitioned by extension id, followed by another level of directories
 100 // for the "default" extension storage partition and one directory for each
 101 // persistent partition used by a webview tag. Example:
 102 //
 103 //   Storage/ext/ABCDEF/def
 104 //   Storage/ext/ABCDEF/hash(partition name)
 105 //
 106 // The code in GetStoragePartitionPath() constructs these path names.
 107 //
 108 // TODO(nasko): Move extension related path code out of content.
 109 const base::FilePath::CharType kStoragePartitionDirname[] =
 110     FILE_PATH_LITERAL("Storage");
 111 const base::FilePath::CharType kExtensionsDirname[] =
 112     FILE_PATH_LITERAL("ext");
 113 const base::FilePath::CharType kDefaultPartitionDirname[] =
 114     FILE_PATH_LITERAL("def");
 115 const base::FilePath::CharType kTrashDirname[] =
 116     FILE_PATH_LITERAL("trash");
 117
 118 // Because partition names are user specified, they can be arbitrarily long
 119 // which makes them unsuitable for paths names. We use a truncation of a
 120 // SHA256 hash to perform a deterministic shortening of the string. The
 121 // kPartitionNameHashBytes constant controls the length of the truncation.
 122 // We use 6 bytes, which gives us 99.999% reliability against collisions over
 123 // 1 million partition domains.
 124 //
 125 // Analysis:
 126 // We assume that all partition names within one partition domain are
 127 // controlled by the the same entity. Thus there is no chance for adverserial
 128 // attack and all we care about is accidental collision. To get 5 9s over
 129 // 1 million domains, we need the probability of a collision in any one domain
 130 // to be
 131 //
 132 //    p < nroot(1000000, .99999) ~= 10^-11
 133 //
 134 // We use the following birthday attack approximation to calculate the max
 135 // number of unique names for this probability:
 136 //
 137 //    n(p,H) = sqrt(2*H * ln(1/(1-p)))
 138 //
 139 // For a 6-byte hash, H = 2^(6*8).  n(10^-11, H) ~= 75
 140 //
 141 // An average partition domain is likely to have less than 10 unique
 142 // partition names which is far lower than 75.
 143 //
 144 // Note, that for 4 9s of reliability, the limit is 237 partition names per
 145 // partition domain.
 146 const int kPartitionNameHashBytes = 6;
 147
 148 // Needed for selecting all files in ObliterateOneDirectory() below.
 149 #if defined(OS_POSIX)
 150 const int kAllFileTypes = base::FileEnumerator::FILES |
 151                           base::FileEnumerator::DIRECTORIES |
 152                           base::FileEnumerator::SHOW_SYM_LINKS;
 153 #else
 154 const int kAllFileTypes = base::FileEnumerator::FILES |
 155                           base::FileEnumerator::DIRECTORIES;
 156 #endif
 157
 158 base::FilePath GetStoragePartitionDomainPath(
 159     const std::string& partition_domain) {
 160   CHECK(base::IsStringUTF8(partition_domain));
 161
 162   return base::FilePath(kStoragePartitionDirname).Append(kExtensionsDirname)
 163       .Append(base::FilePath::FromUTF8Unsafe(partition_domain));
 164 }
 165
 166 // Helper function for doing a depth-first deletion of the data on disk.
 167 // Examines paths directly in |current_dir| (no recursion) and tries to
 168 // delete from disk anything that is in, or isn't a parent of something in
 169 // |paths_to_keep|. Paths that need further expansion are added to
 170 // |paths_to_consider|.
 171 void ObliterateOneDirectory(const base::FilePath& current_dir,
 172                             const std::vector<base::FilePath>& paths_to_keep,
 173                             std::vector<base::FilePath>* paths_to_consider) {
 174   CHECK(current_dir.IsAbsolute());
 175
 176   base::FileEnumerator enumerator(current_dir, false, kAllFileTypes);
 177   for (base::FilePath to_delete = enumerator.Next(); !to_delete.empty();
 178        to_delete = enumerator.Next()) {
 179     // Enum tracking which of the 3 possible actions to take for |to_delete|.
 180     enum { kSkip, kEnqueue, kDelete } action = kDelete;
 181
 182     for (std::vector<base::FilePath>::const_iterator to_keep =
 183              paths_to_keep.begin();
 184          to_keep != paths_to_keep.end();
 185          ++to_keep) {
 186       if (to_delete == *to_keep) {
 187         action = kSkip;
 188         break;
 189       } else if (to_delete.IsParent(*to_keep)) {
 190         // |to_delete| contains a path to keep. Add to stack for further
 191         // processing.
 192         action = kEnqueue;
 193         break;
 194       }
 195     }
 196
 197     switch (action) {
 198       case kDelete:
 199         base::DeleteFile(to_delete, true);
 200         break;
 201
 202       case kEnqueue:
 203         paths_to_consider->push_back(to_delete);
 204         break;
 205
 206       case kSkip:
 207         break;
 208     }
 209   }
 210 }
 211
 212 // Synchronously attempts to delete |unnormalized_root|, preserving only
 213 // entries in |paths_to_keep|. If there are no entries in |paths_to_keep| on
 214 // disk, then it completely removes |unnormalized_root|. All paths must be
 215 // absolute paths.
 216 void BlockingObliteratePath(
 217     const base::FilePath& unnormalized_browser_context_root,
 218     const base::FilePath& unnormalized_root,
 219     const std::vector<base::FilePath>& paths_to_keep,
 220     const scoped_refptr<base::TaskRunner>& closure_runner,
 221     const base::Closure& on_gc_required) {
 222   // Early exit required because MakeAbsoluteFilePath() will fail on POSIX
 223   // if |unnormalized_root| does not exist. This is safe because there is
 224   // nothing to do in this situation anwyays.
 225   if (!base::PathExists(unnormalized_root)) {
 226     return;
 227   }
 228
 229   // Never try to obliterate things outside of the browser context root or the
 230   // browser context root itself. Die hard.
 231   base::FilePath root = base::MakeAbsoluteFilePath(unnormalized_root);
 232   base::FilePath browser_context_root =
 233       base::MakeAbsoluteFilePath(unnormalized_browser_context_root);
 234   CHECK(!root.empty());
 235   CHECK(!browser_context_root.empty());
 236   CHECK(browser_context_root.IsParent(root) && browser_context_root != root);
 237
 238   // Reduce |paths_to_keep| set to those under the root and actually on disk.
 239   std::vector<base::FilePath> valid_paths_to_keep;
 240   for (std::vector<base::FilePath>::const_iterator it = paths_to_keep.begin();
 241        it != paths_to_keep.end();
 242        ++it) {
 243     if (root.IsParent(*it) && base::PathExists(*it))
 244       valid_paths_to_keep.push_back(*it);
 245   }
 246
 247   // If none of the |paths_to_keep| are valid anymore then we just whack the
 248   // root and be done with it.  Otherwise, signal garbage collection and do
 249   // a best-effort delete of the on-disk structures.
 250   if (valid_paths_to_keep.empty()) {
 251     base::DeleteFile(root, true);
 252     return;
 253   }
 254   closure_runner->PostTask(FROM_HERE, on_gc_required);
 255
 256   // Otherwise, start at the root and delete everything that is not in
 257   // |valid_paths_to_keep|.
 258   std::vector<base::FilePath> paths_to_consider;
 259   paths_to_consider.push_back(root);
 260   while(!paths_to_consider.empty()) {
 261     base::FilePath path = paths_to_consider.back();
 262     paths_to_consider.pop_back();
 263     ObliterateOneDirectory(path, valid_paths_to_keep, &paths_to_consider);
 264   }
 265 }
 266
 267 // Ensures each path in |active_paths| is a direct child of storage_root.
 268 void NormalizeActivePaths(const base::FilePath& storage_root,
 269                           base::hash_set<base::FilePath>* active_paths) {
 270   base::hash_set<base::FilePath> normalized_active_paths;
 271
 272   for (base::hash_set<base::FilePath>::iterator iter = active_paths->begin();
 273        iter != active_paths->end(); ++iter) {
 274     base::FilePath relative_path;
 275     if (!storage_root.AppendRelativePath(*iter, &relative_path))
 276       continue;
 277
 278     std::vector<base::FilePath::StringType> components;
 279     relative_path.GetComponents(&components);
 280
 281     DCHECK(!relative_path.empty());
 282     normalized_active_paths.insert(storage_root.Append(components.front()));
 283   }
 284
 285   active_paths->swap(normalized_active_paths);
 286 }
 287
 288 // Deletes all entries inside the |storage_root| that are not in the
 289 // |active_paths|.  Deletion is done in 2 steps:
 290 //
 291 //   (1) Moving all garbage collected paths into a trash directory.
 292 //   (2) Asynchronously deleting the trash directory.
 293 //
 294 // The deletion is asynchronous because after (1) completes, calling code can
 295 // safely continue to use the paths that had just been garbage collected
 296 // without fear of race conditions.
 297 //
 298 // This code also ignores failed moves rather than attempting a smarter retry.
 299 // Moves shouldn't fail here unless there is some out-of-band error (eg.,
 300 // FS corruption). Retry logic is dangerous in the general case because
 301 // there is not necessarily a guaranteed case where the logic may succeed.
 302 //
 303 // This function is still named BlockingGarbageCollect() because it does
 304 // execute a few filesystem operations synchronously.
 305 void BlockingGarbageCollect(
 306     const base::FilePath& storage_root,
 307     const scoped_refptr<base::TaskRunner>& file_access_runner,
 308     scoped_ptr<base::hash_set<base::FilePath> > active_paths) {
 309   CHECK(storage_root.IsAbsolute());
 310
 311   NormalizeActivePaths(storage_root, active_paths.get());
 312
 313   base::FileEnumerator enumerator(storage_root, false, kAllFileTypes);
 314   base::FilePath trash_directory;
 315   if (!base::CreateTemporaryDirInDir(storage_root, kTrashDirname,
 316                                      &trash_directory)) {
 317     // Unable to continue without creating the trash directory so give up.
 318     return;
 319   }
 320   for (base::FilePath path = enumerator.Next(); !path.empty();
 321        path = enumerator.Next()) {
 322     if (active_paths->find(path) == active_paths->end() &&
 323         path != trash_directory) {
 324       // Since |trash_directory| is unique for each run of this function there
 325       // can be no colllisions on the move.
 326       base::Move(path, trash_directory.Append(path.BaseName()));
 327     }
 328   }
 329
 330   file_access_runner->PostTask(
 331       FROM_HERE,
 332       base::Bind(base::IgnoreResult(&base::DeleteFile), trash_directory, true));
 333 }
 334
 335 }  // namespace
 336
 337 // static
 338 base::FilePath StoragePartitionImplMap::GetStoragePartitionPath(
 339     const std::string& partition_domain,
 340     const std::string& partition_name) {
 341   if (partition_domain.empty())
 342     return base::FilePath();
 343
 344   base::FilePath path = GetStoragePartitionDomainPath(partition_domain);
 345
 346   // TODO(ajwong): Mangle in-memory into this somehow, either by putting
 347   // it into the partition_name, or by manually adding another path component
 348   // here.  Otherwise, it's possible to have an in-memory StoragePartition and
 349   // a persistent one that return the same FilePath for GetPath().
 350   if (!partition_name.empty()) {
 351     // For analysis of why we can ignore collisions, see the comment above
 352     // kPartitionNameHashBytes.
 353     char buffer[kPartitionNameHashBytes];
 354     crypto::SHA256HashString(partition_name, &buffer[0],
 355                              sizeof(buffer));
 356     return path.AppendASCII(base::HexEncode(buffer, sizeof(buffer)));
 357   }
 358
 359   return path.Append(kDefaultPartitionDirname);
 360 }
 361
 362 StoragePartitionImplMap::StoragePartitionImplMap(
 363     BrowserContext* browser_context)
 364     : browser_context_(browser_context),
 365       resource_context_initialized_(false) {
 366   // Doing here instead of initializer list cause it's just too ugly to read.
 367   base::SequencedWorkerPool* blocking_pool = BrowserThread::GetBlockingPool();
 368   file_access_runner_ =
 369       blocking_pool->GetSequencedTaskRunner(blocking_pool->GetSequenceToken());
 370 }
 371
 372 StoragePartitionImplMap::~StoragePartitionImplMap() {
 373   STLDeleteContainerPairSecondPointers(partitions_.begin(),
 374                                        partitions_.end());
 375 }
 376
 377 StoragePartitionImpl* StoragePartitionImplMap::Get(
 378     const std::string& partition_domain,
 379     const std::string& partition_name,
 380     bool in_memory) {
 381   // Find the previously created partition if it's available.
 382   StoragePartitionConfig partition_config(
 383       partition_domain, partition_name, in_memory);
 384
 385   PartitionMap::const_iterator it = partitions_.find(partition_config);
 386   if (it != partitions_.end())
 387     return it->second;
 388
 389   base::FilePath partition_path =
 390       browser_context_->GetPath().Append(
 391           GetStoragePartitionPath(partition_domain, partition_name));
 392   StoragePartitionImpl* partition =
 393       StoragePartitionImpl::Create(browser_context_, in_memory,
 394                                    partition_path);
 395   partitions_[partition_config] = partition;
 396
 397   ChromeBlobStorageContext* blob_storage_context =
 398       ChromeBlobStorageContext::GetFor(browser_context_);
 399   StreamContext* stream_context = StreamContext::GetFor(browser_context_);
 400   ProtocolHandlerMap protocol_handlers;
 401   protocol_handlers[url::kBlobScheme] =
 402       linked_ptr<net::URLRequestJobFactory::ProtocolHandler>(
 403           new BlobProtocolHandler(blob_storage_context,
 404                                   stream_context,
 405                                   partition->GetFileSystemContext()));
 406   protocol_handlers[url::kFileSystemScheme] =
 407       linked_ptr<net::URLRequestJobFactory::ProtocolHandler>(
 408           CreateFileSystemProtocolHandler(partition_domain,
 409                                           partition->GetFileSystemContext()));
 410   protocol_handlers[kChromeUIScheme] =
 411       linked_ptr<net::URLRequestJobFactory::ProtocolHandler>(
 412           URLDataManagerBackend::CreateProtocolHandler(
 413               browser_context_->GetResourceContext(),
 414               browser_context_->IsOffTheRecord(),
 415               partition->GetAppCacheService(),
 416               blob_storage_context));
 417   std::vector<std::string> additional_webui_schemes;
 418   GetContentClient()->browser()->GetAdditionalWebUISchemes(
 419       &additional_webui_schemes);
 420   for (std::vector<std::string>::const_iterator it =
 421            additional_webui_schemes.begin();
 422        it != additional_webui_schemes.end();
 423        ++it) {
 424     protocol_handlers[*it] =
 425         linked_ptr<net::URLRequestJobFactory::ProtocolHandler>(
 426             URLDataManagerBackend::CreateProtocolHandler(
 427                 browser_context_->GetResourceContext(),
 428                 browser_context_->IsOffTheRecord(),
 429                 partition->GetAppCacheService(),
 430                 blob_storage_context));
 431   }
 432   protocol_handlers[kChromeDevToolsScheme] =
 433       linked_ptr<net::URLRequestJobFactory::ProtocolHandler>(
 434           CreateDevToolsProtocolHandler(browser_context_->GetResourceContext(),
 435                                         browser_context_->IsOffTheRecord()));
 436
 437   URLRequestInterceptorScopedVector request_interceptors;
 438   request_interceptors.push_back(
 439       ServiceWorkerRequestHandler::CreateInterceptor(
 440           browser_context_->GetResourceContext()).release());
 441   request_interceptors.push_back(new AppCacheInterceptor());
 442
 443   // These calls must happen after StoragePartitionImpl::Create().
 444   if (partition_domain.empty()) {
 445     partition->SetURLRequestContext(
 446         GetContentClient()->browser()->CreateRequestContext(
 447             browser_context_,
 448             &protocol_handlers,
 449             request_interceptors.Pass()));
 450   } else {
 451     partition->SetURLRequestContext(
 452         GetContentClient()->browser()->CreateRequestContextForStoragePartition(
 453             browser_context_,
 454             partition->GetPath(),
 455             in_memory,
 456             &protocol_handlers,
 457             request_interceptors.Pass()));
 458   }
 459   partition->SetMediaURLRequestContext(
 460       partition_domain.empty() ?
 461       browser_context_->GetMediaRequestContext() :
 462       browser_context_->GetMediaRequestContextForStoragePartition(
 463           partition->GetPath(), in_memory));
 464
 465   GetContentClient()->browser()->GetAdditionalNavigatorConnectServices(
 466       partition->GetNavigatorConnectContext());
 467
 468   PostCreateInitialization(partition, in_memory);
 469
 470   return partition;
 471 }
 472
 473 void StoragePartitionImplMap::AsyncObliterate(
 474     const GURL& site,
 475     const base::Closure& on_gc_required) {
 476   // This method should avoid creating any StoragePartition (which would
 477   // create more open file handles) so that it can delete as much of the
 478   // data off disk as possible.
 479   std::string partition_domain;
 480   std::string partition_name;
 481   bool in_memory = false;
 482   GetContentClient()->browser()->GetStoragePartitionConfigForSite(
 483       browser_context_, site, false, &partition_domain,
 484       &partition_name, &in_memory);
 485
 486   // Find the active partitions for the domain. Because these partitions are
 487   // active, it is not possible to just delete the directories that contain
 488   // the backing data structures without causing the browser to crash. Instead,
 489   // of deleteing the directory, we tell each storage context later to
 490   // remove any data they have saved. This will leave the directory structure
 491   // intact but it will only contain empty databases.
 492   std::vector<StoragePartitionImpl*> active_partitions;
 493   std::vector<base::FilePath> paths_to_keep;
 494   for (PartitionMap::const_iterator it = partitions_.begin();
 495        it != partitions_.end();
 496        ++it) {
 497     const StoragePartitionConfig& config = it->first;
 498     if (config.partition_domain == partition_domain) {
 499       it->second->ClearData(
 500           // All except shader cache.
 501           ~StoragePartition::REMOVE_DATA_MASK_SHADER_CACHE,
 502           StoragePartition::QUOTA_MANAGED_STORAGE_MASK_ALL,
 503           GURL(),
 504           StoragePartition::OriginMatcherFunction(),
 505           base::Time(), base::Time::Max(),
 506           base::Bind(&base::DoNothing));
 507       if (!config.in_memory) {
 508         paths_to_keep.push_back(it->second->GetPath());
 509       }
 510     }
 511   }
 512
 513   // Start a best-effort delete of the on-disk storage excluding paths that are
 514   // known to still be in use. This is to delete any previously created
 515   // StoragePartition state that just happens to not have been used during this
 516   // run of the browser.
 517   base::FilePath domain_root = browser_context_->GetPath().Append(
 518       GetStoragePartitionDomainPath(partition_domain));
 519
 520   BrowserThread::PostBlockingPoolTask(
 521       FROM_HERE,
 522       base::Bind(&BlockingObliteratePath, browser_context_->GetPath(),
 523                  domain_root, paths_to_keep,
 524                  base::MessageLoopProxy::current(), on_gc_required));
 525 }
 526
 527 void StoragePartitionImplMap::GarbageCollect(
 528     scoped_ptr<base::hash_set<base::FilePath> > active_paths,
 529     const base::Closure& done) {
 530   // Include all paths for current StoragePartitions in the active_paths since
 531   // they cannot be deleted safely.
 532   for (PartitionMap::const_iterator it = partitions_.begin();
 533        it != partitions_.end();
 534        ++it) {
 535     const StoragePartitionConfig& config = it->first;
 536     if (!config.in_memory)
 537       active_paths->insert(it->second->GetPath());
 538   }
 539
 540   // Find the directory holding the StoragePartitions and delete everything in
 541   // there that isn't considered active.
 542   base::FilePath storage_root = browser_context_->GetPath().Append(
 543       GetStoragePartitionDomainPath(std::string()));
 544   file_access_runner_->PostTaskAndReply(
 545       FROM_HERE,
 546       base::Bind(&BlockingGarbageCollect, storage_root,
 547                  file_access_runner_,
 548                  base::Passed(&active_paths)),
 549       done);
 550 }
 551
 552 void StoragePartitionImplMap::ForEach(
 553     const BrowserContext::StoragePartitionCallback& callback) {
 554   for (PartitionMap::const_iterator it = partitions_.begin();
 555        it != partitions_.end();
 556        ++it) {
 557     callback.Run(it->second);
 558   }
 559 }
 560
 561 void StoragePartitionImplMap::PostCreateInitialization(
 562     StoragePartitionImpl* partition,
 563     bool in_memory) {
 564   // TODO(ajwong): ResourceContexts no longer have any storage related state.
 565   // We should move this into a place where it is called once per
 566   // BrowserContext creation rather than piggybacking off the default context
 567   // creation.
 568   // Note: moving this into Get() before partitions_[] is set causes reentrency.
 569   if (!resource_context_initialized_) {
 570     resource_context_initialized_ = true;
 571     InitializeResourceContext(browser_context_);
 572   }
 573
 574   // Check first to avoid memory leak in unittests.
 575   if (BrowserThread::IsMessageLoopValid(BrowserThread::IO)) {
 576     BrowserThread::PostTask(
 577         BrowserThread::IO, FROM_HERE,
 578         base::Bind(&ChromeAppCacheService::InitializeOnIOThread,
 579                    partition->GetAppCacheService(),
 580                    in_memory ? base::FilePath() :
 581                        partition->GetPath().Append(kAppCacheDirname),
 582                    browser_context_->GetResourceContext(),
 583                    make_scoped_refptr(partition->GetURLRequestContext()),
 584                    make_scoped_refptr(
 585                        browser_context_->GetSpecialStoragePolicy())));
 586
 587     BrowserThread::PostTask(
 588         BrowserThread::IO, FROM_HERE,
 589         base::Bind(&CacheStorageContextImpl::SetBlobParametersForCache,
 590                    partition->GetCacheStorageContext(),
 591                    make_scoped_refptr(partition->GetURLRequestContext()),
 592                    make_scoped_refptr(
 593                        ChromeBlobStorageContext::GetFor(browser_context_))));
 594
 595     // We do not call InitializeURLRequestContext() for media contexts because,
 596     // other than the HTTP cache, the media contexts share the same backing
 597     // objects as their associated "normal" request context.  Thus, the previous
 598     // call serves to initialize the media request context for this storage
 599     // partition as well.
 600   }
 601 }
 602
 603 }  // namespace content