chrome/browser/profiles/host_zoom_map_browsertest.cc

   1 // Copyright 2014 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/public/browser/host_zoom_map.h"
   6
   7 #include <algorithm>
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/bind.h"
  12 #include "base/command_line.h"
  13 #include "base/files/file_path.h"
  14 #include "base/files/file_util.h"
  15 #include "base/memory/ref_counted.h"
  16 #include "base/memory/scoped_ptr.h"
  17 #include "base/path_service.h"
  18 #include "base/prefs/pref_service.h"
  19 #include "base/strings/stringprintf.h"
  20 #include "base/values.h"
  21 #include "chrome/browser/profiles/profile.h"
  22 #include "chrome/browser/profiles/profile_impl.h"
  23 #include "chrome/browser/ui/browser.h"
  24 #include "chrome/browser/ui/tabs/tab_strip_model.h"
  25 #include "chrome/browser/ui/zoom/chrome_zoom_level_prefs.h"
  26 #include "chrome/common/chrome_constants.h"
  27 #include "chrome/common/chrome_paths.h"
  28 #include "chrome/common/pref_names.h"
  29 #include "chrome/common/url_constants.h"
  30 #include "chrome/test/base/in_process_browser_test.h"
  31 #include "chrome/test/base/testing_profile.h"
  32 #include "chrome/test/base/ui_test_utils.h"
  33 #include "components/signin/core/common/profile_management_switches.h"
  34 #include "components/signin/core/common/signin_switches.h"
  35 #include "components/ui/zoom/page_zoom.h"
  36 #include "components/ui/zoom/zoom_event_manager.h"
  37 #include "content/public/test/test_utils.h"
  38 #include "net/dns/mock_host_resolver.h"
  39 #include "net/test/embedded_test_server/embedded_test_server.h"
  40 #include "net/test/embedded_test_server/http_response.h"
  41 #include "testing/gmock/include/gmock/gmock.h"
  42 #include "url/gurl.h"
  43
  44 using content::HostZoomMap;
  45
  46 namespace {
  47
  48 class ZoomLevelChangeObserver {
  49  public:
  50   explicit ZoomLevelChangeObserver(content::BrowserContext* context)
  51       : message_loop_runner_(new content::MessageLoopRunner) {
  52     subscription_ = ui_zoom::ZoomEventManager::GetForBrowserContext(context)
  53                         ->AddZoomLevelChangedCallback(base::Bind(
  54                             &ZoomLevelChangeObserver::OnZoomLevelChanged,
  55                             base::Unretained(this)));
  56   }
  57
  58   void BlockUntilZoomLevelForHostHasChanged(const std::string& host) {
  59     while (!std::count(changed_hosts_.begin(), changed_hosts_.end(), host)) {
  60       message_loop_runner_->Run();
  61       message_loop_runner_ = new content::MessageLoopRunner;
  62     }
  63     changed_hosts_.clear();
  64   }
  65
  66  private:
  67   void OnZoomLevelChanged(const content::HostZoomMap::ZoomLevelChange& change) {
  68     changed_hosts_.push_back(change.host);
  69     message_loop_runner_->Quit();
  70   }
  71
  72   scoped_refptr<content::MessageLoopRunner> message_loop_runner_;
  73   std::vector<std::string> changed_hosts_;
  74   scoped_ptr<content::HostZoomMap::Subscription> subscription_;
  75
  76   DISALLOW_COPY_AND_ASSIGN(ZoomLevelChangeObserver);
  77 };
  78
  79 }  // namespace
  80
  81 class HostZoomMapBrowserTest : public InProcessBrowserTest {
  82  public:
  83   HostZoomMapBrowserTest() {}
  84
  85  protected:
  86   void SetDefaultZoomLevel(double level) {
  87     browser()->profile()->GetZoomLevelPrefs()->SetDefaultZoomLevelPref(level);
  88   }
  89
  90   double GetZoomLevel(const GURL& url) {
  91     content::HostZoomMap* host_zoom_map = static_cast<content::HostZoomMap*>(
  92         content::HostZoomMap::GetDefaultForBrowserContext(
  93             browser()->profile()));
  94     return host_zoom_map->GetZoomLevelForHostAndScheme(url.scheme(),
  95                                                        url.host());
  96   }
  97
  98   std::vector<std::string> GetHostsWithZoomLevels() {
  99     typedef content::HostZoomMap::ZoomLevelVector ZoomLevelVector;
 100     content::HostZoomMap* host_zoom_map = static_cast<content::HostZoomMap*>(
 101         content::HostZoomMap::GetDefaultForBrowserContext(
 102             browser()->profile()));
 103     content::HostZoomMap::ZoomLevelVector zoom_levels =
 104         host_zoom_map->GetAllZoomLevels();
 105     std::vector<std::string> results;
 106     for (ZoomLevelVector::const_iterator it = zoom_levels.begin();
 107          it != zoom_levels.end(); ++it)
 108       results.push_back(it->host);
 109     return results;
 110   }
 111
 112   std::vector<std::string> GetHostsWithZoomLevelsFromPrefs() {
 113     PrefService* prefs = browser()->profile()->GetPrefs();
 114     const base::DictionaryValue* dictionaries =
 115         prefs->GetDictionary(prefs::kPartitionPerHostZoomLevels);
 116     const base::DictionaryValue* values = NULL;
 117     std::string partition_key =
 118         chrome::ChromeZoomLevelPrefs::GetHashForTesting(base::FilePath());
 119     dictionaries->GetDictionary(partition_key, &values);
 120     std::vector<std::string> results;
 121     if (values) {
 122       for (base::DictionaryValue::Iterator it(*values);
 123            !it.IsAtEnd(); it.Advance())
 124         results.push_back(it.key());
 125     }
 126     return results;
 127   }
 128
 129   GURL ConstructTestServerURL(const char* url_template) {
 130     return GURL(base::StringPrintf(
 131         url_template, embedded_test_server()->port()));
 132   }
 133
 134  private:
 135   scoped_ptr<net::test_server::HttpResponse> HandleRequest(
 136       const net::test_server::HttpRequest& request) {
 137     return scoped_ptr<net::test_server::HttpResponse>(
 138         new net::test_server::BasicHttpResponse);
 139   }
 140
 141   // BrowserTestBase:
 142   void SetUpOnMainThread() override {
 143     ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
 144     embedded_test_server()->RegisterRequestHandler(base::Bind(
 145         &HostZoomMapBrowserTest::HandleRequest, base::Unretained(this)));
 146     host_resolver()->AddRule("*", "127.0.0.1");
 147   }
 148
 149   DISALLOW_COPY_AND_ASSIGN(HostZoomMapBrowserTest);
 150 };
 151
 152 #define PARTITION_KEY_PLACEHOLDER "NNN"
 153
 154 class HostZoomMapBrowserTestWithPrefs : public HostZoomMapBrowserTest {
 155  public:
 156   explicit HostZoomMapBrowserTestWithPrefs(const std::string& prefs_data)
 157       : prefs_data_(prefs_data) {}
 158
 159  private:
 160   // InProcessBrowserTest:
 161   bool SetUpUserDataDirectory() override {
 162     std::replace(prefs_data_.begin(), prefs_data_.end(), '\'', '\"');
 163     // It seems the hash functions on different platforms can return different
 164     // values for the same input, so make sure we test with the hash appropriate
 165     // for the platform.
 166     std::string hash_string =
 167         chrome::ChromeZoomLevelPrefs::GetHashForTesting(base::FilePath());
 168     std::string partition_key_placeholder(PARTITION_KEY_PLACEHOLDER);
 169     size_t start_index;
 170     while ((start_index = prefs_data_.find(partition_key_placeholder)) !=
 171            std::string::npos) {
 172       prefs_data_.replace(
 173           start_index, partition_key_placeholder.size(), hash_string);
 174     }
 175
 176     base::FilePath user_data_directory, path_to_prefs;
 177     PathService::Get(chrome::DIR_USER_DATA, &user_data_directory);
 178     path_to_prefs = user_data_directory
 179         .AppendASCII(TestingProfile::kTestUserProfileDir)
 180         .Append(chrome::kPreferencesFilename);
 181     base::CreateDirectory(path_to_prefs.DirName());
 182     base::WriteFile(
 183         path_to_prefs, prefs_data_.c_str(), prefs_data_.size());
 184     return true;
 185   }
 186
 187   std::string prefs_data_;
 188
 189   DISALLOW_COPY_AND_ASSIGN(HostZoomMapBrowserTestWithPrefs);
 190 };
 191
 192 // Zoom-related preferences demonstrating the two problems that
 193 // could be caused by the bug. They incorrectly contain a per-host
 194 // zoom level for the empty host; and a value for 'host1' that only
 195 // differs from the default by epsilon. Neither should have been
 196 // persisted.
 197 const char kSanitizationTestPrefs[] =
 198     "{'partition': {"
 199     "   'default_zoom_level': { '" PARTITION_KEY_PLACEHOLDER "': 1.2 },"
 200     "   'per_host_zoom_levels': {"
 201     "     '" PARTITION_KEY_PLACEHOLDER "': {"
 202     "       '': 1.1, 'host1': 1.20001, 'host2': 1.3 }"
 203     "   }"
 204     "}}";
 205
 206 #undef PARTITION_KEY_PLACEHOLDER
 207
 208 class HostZoomMapSanitizationBrowserTest
 209     : public HostZoomMapBrowserTestWithPrefs {
 210  public:
 211   HostZoomMapSanitizationBrowserTest()
 212       : HostZoomMapBrowserTestWithPrefs(kSanitizationTestPrefs) {}
 213
 214  private:
 215   DISALLOW_COPY_AND_ASSIGN(HostZoomMapSanitizationBrowserTest);
 216 };
 217
 218 // Regression test for crbug.com/437392
 219 IN_PROC_BROWSER_TEST_F(HostZoomMapBrowserTest, ZoomEventsWorkForOffTheRecord) {
 220   GURL test_url(url::kAboutBlankURL);
 221   std::string test_host(test_url.host());
 222   std::string test_scheme(test_url.scheme());
 223   Browser* incognito_browser =
 224       ui_test_utils::OpenURLOffTheRecord(browser()->profile(), test_url);
 225
 226   content::WebContents* web_contents =
 227       incognito_browser->tab_strip_model()->GetActiveWebContents();
 228
 229   content::BrowserContext* context = web_contents->GetBrowserContext();
 230   EXPECT_TRUE(context->IsOffTheRecord());
 231   ZoomLevelChangeObserver observer(context);
 232   HostZoomMap* host_zoom_map = HostZoomMap::GetForWebContents(web_contents);
 233
 234   double new_zoom_level =
 235       host_zoom_map->GetZoomLevelForHostAndScheme(test_scheme, test_host) + 0.5;
 236   host_zoom_map->SetZoomLevelForHostAndScheme(test_scheme, test_host,
 237                                               new_zoom_level);
 238   observer.BlockUntilZoomLevelForHostHasChanged(test_host);
 239   EXPECT_EQ(new_zoom_level, host_zoom_map->GetZoomLevelForHostAndScheme(
 240                                 test_scheme, test_host));
 241 }
 242
 243 IN_PROC_BROWSER_TEST_F(
 244     HostZoomMapBrowserTest,
 245     WebviewBasedSigninUsesDefaultStoragePartitionForEmbedder) {
 246   GURL test_url = ConstructTestServerURL(chrome::kChromeUIChromeSigninURL);
 247   std::string test_host(test_url.host());
 248   std::string test_scheme(test_url.scheme());
 249   ui_test_utils::NavigateToURL(browser(), test_url);
 250
 251   content::WebContents* web_contents =
 252       browser()->tab_strip_model()->GetActiveWebContents();
 253
 254   HostZoomMap* host_zoom_map = HostZoomMap::GetForWebContents(web_contents);
 255
 256   // For the webview based sign-in code, the sign in page uses the default host
 257   // zoom map.
 258   HostZoomMap* default_profile_host_zoom_map =
 259       HostZoomMap::GetDefaultForBrowserContext(browser()->profile());
 260   // Since ChromeOS still uses IFrame-based signin, we should expect the
 261   // storage partition to be different if Webview signin is not enabled.
 262   if (switches::IsEnableWebviewBasedSignin())
 263     EXPECT_EQ(host_zoom_map, default_profile_host_zoom_map);
 264   else
 265     EXPECT_NE(host_zoom_map, default_profile_host_zoom_map);
 266 }
 267
 268 class HostZoomMapIframeSigninBrowserTest : public HostZoomMapBrowserTest {
 269  public:
 270   void SetUpCommandLine(base::CommandLine* command_line) override {
 271     command_line->AppendSwitch(switches::kEnableIframeBasedSignin);
 272   }
 273 };
 274
 275 // Regression test for crbug.com/435017.
 276 IN_PROC_BROWSER_TEST_F(HostZoomMapIframeSigninBrowserTest,
 277                        EventsForNonDefaultStoragePartition) {
 278   ZoomLevelChangeObserver observer(browser()->profile());
 279   // TODO(wjmaclean): Make this test more general by implementing a way to
 280   // force a generic URL to be loaded in a non-default storage partition. This
 281   // test currently relies on the signin page being loaded into a non-default
 282   // storage partition (and verifies this is the case), but ultimately it would
 283   // be better not to rely on what the signin page is doing.
 284   GURL test_url = ConstructTestServerURL(chrome::kChromeUIChromeSigninURL);
 285   std::string test_host(test_url.host());
 286   std::string test_scheme(test_url.scheme());
 287   ui_test_utils::NavigateToURL(browser(), test_url);
 288
 289   content::WebContents* web_contents =
 290       browser()->tab_strip_model()->GetActiveWebContents();
 291
 292   // We are forcing non-webview based signin, so we expect the signin page to
 293   // be in a different storage partition, and hence a different HostZoomMap.
 294   HostZoomMap* host_zoom_map = HostZoomMap::GetForWebContents(web_contents);
 295
 296   EXPECT_FALSE(switches::IsEnableWebviewBasedSignin());
 297   HostZoomMap* default_profile_host_zoom_map =
 298       HostZoomMap::GetDefaultForBrowserContext(browser()->profile());
 299   EXPECT_NE(host_zoom_map, default_profile_host_zoom_map);
 300
 301   double new_zoom_level =
 302       host_zoom_map->GetZoomLevelForHostAndScheme(test_scheme, test_host) + 0.5;
 303   host_zoom_map->SetZoomLevelForHostAndScheme(test_scheme, test_host,
 304                                               new_zoom_level);
 305   observer.BlockUntilZoomLevelForHostHasChanged(test_host);
 306   EXPECT_EQ(new_zoom_level, host_zoom_map->GetZoomLevelForHostAndScheme(
 307                                 test_scheme, test_host));
 308 }
 309
 310 // Regression test for crbug.com/364399.
 311 IN_PROC_BROWSER_TEST_F(HostZoomMapBrowserTest, ToggleDefaultZoomLevel) {
 312   const double default_zoom_level = content::ZoomFactorToZoomLevel(1.5);
 313
 314   const char kTestURLTemplate1[] = "http://host1:%u/";
 315   const char kTestURLTemplate2[] = "http://host2:%u/";
 316
 317   ZoomLevelChangeObserver observer(browser()->profile());
 318
 319   GURL test_url1 = ConstructTestServerURL(kTestURLTemplate1);
 320   ui_test_utils::NavigateToURL(browser(), test_url1);
 321
 322   SetDefaultZoomLevel(default_zoom_level);
 323   observer.BlockUntilZoomLevelForHostHasChanged(test_url1.host());
 324   EXPECT_TRUE(
 325       content::ZoomValuesEqual(default_zoom_level, GetZoomLevel(test_url1)));
 326
 327   GURL test_url2 = ConstructTestServerURL(kTestURLTemplate2);
 328   ui_test_utils::NavigateToURLWithDisposition(
 329       browser(), test_url2, NEW_FOREGROUND_TAB,
 330       ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
 331   EXPECT_TRUE(
 332       content::ZoomValuesEqual(default_zoom_level, GetZoomLevel(test_url2)));
 333
 334   content::WebContents* web_contents =
 335       browser()->tab_strip_model()->GetActiveWebContents();
 336   ui_zoom::PageZoom::Zoom(web_contents, content::PAGE_ZOOM_OUT);
 337   observer.BlockUntilZoomLevelForHostHasChanged(test_url2.host());
 338   EXPECT_FALSE(
 339       content::ZoomValuesEqual(default_zoom_level, GetZoomLevel(test_url2)));
 340
 341   ui_zoom::PageZoom::Zoom(web_contents, content::PAGE_ZOOM_IN);
 342   observer.BlockUntilZoomLevelForHostHasChanged(test_url2.host());
 343   EXPECT_TRUE(
 344       content::ZoomValuesEqual(default_zoom_level, GetZoomLevel(test_url2)));
 345
 346   // Now both tabs should be at the default zoom level, so there should not be
 347   // any per-host values saved either to Pref, or internally in HostZoomMap.
 348   EXPECT_TRUE(GetHostsWithZoomLevels().empty());
 349   EXPECT_TRUE(GetHostsWithZoomLevelsFromPrefs().empty());
 350 }
 351
 352 // Test that garbage data from crbug.com/364399 is cleared up on startup.
 353 IN_PROC_BROWSER_TEST_F(HostZoomMapSanitizationBrowserTest, ClearOnStartup) {
 354   EXPECT_THAT(GetHostsWithZoomLevels(), testing::ElementsAre("host2"));
 355   EXPECT_THAT(GetHostsWithZoomLevelsFromPrefs(), testing::ElementsAre("host2"));
 356 }
 357
 358 // In this case we migrate the zoom level data from the profile prefs.
 359 const char kMigrationTestPrefs[] =
 360     "{'profile': {"
 361     "   'default_zoom_level': 1.2,"
 362     "   'per_host_zoom_levels': {'': 1.1, 'host1': 1.20001, 'host2': "
 363     "1.3}"
 364     "}}";
 365
 366 class HostZoomMapMigrationBrowserTest : public HostZoomMapBrowserTestWithPrefs {
 367  public:
 368   HostZoomMapMigrationBrowserTest()
 369       : HostZoomMapBrowserTestWithPrefs(kMigrationTestPrefs) {}
 370
 371   static const double kOriginalDefaultZoomLevel;
 372
 373  private:
 374   DISALLOW_COPY_AND_ASSIGN(HostZoomMapMigrationBrowserTest);
 375 };
 376
 377 const double HostZoomMapMigrationBrowserTest::kOriginalDefaultZoomLevel = 1.2;
 378
 379 // This test is the same as HostZoomMapSanitizationBrowserTest, except that the
 380 // zoom level data is loaded from the profile prefs, transfered to the
 381 // zoom-level prefs, and we verify that the profile zoom level prefs are
 382 // erased in the process. We also test that changes to the host zoom map and the
 383 // default zoom level don't propagate back to the profile prefs.
 384 IN_PROC_BROWSER_TEST_F(HostZoomMapMigrationBrowserTest,
 385                        MigrateProfileZoomPreferences) {
 386   EXPECT_THAT(GetHostsWithZoomLevels(), testing::ElementsAre("host2"));
 387   EXPECT_THAT(GetHostsWithZoomLevelsFromPrefs(), testing::ElementsAre("host2"));
 388
 389   PrefService* profile_prefs =
 390       browser()->profile()->GetPrefs();
 391   chrome::ChromeZoomLevelPrefs* zoom_level_prefs =
 392       browser()->profile()->GetZoomLevelPrefs();
 393   // Make sure that the profile pref for default zoom level has been set to
 394   // its default value of 0.0.
 395   EXPECT_EQ(0.0, profile_prefs->GetDouble(prefs::kDefaultZoomLevelDeprecated));
 396   EXPECT_EQ(kOriginalDefaultZoomLevel,
 397             zoom_level_prefs->GetDefaultZoomLevelPref());
 398
 399   // Make sure that the profile prefs for per-host zoom levels are erased.
 400   {
 401     const base::DictionaryValue* profile_host_zoom_dictionary =
 402         profile_prefs->GetDictionary(prefs::kPerHostZoomLevelsDeprecated);
 403     EXPECT_EQ(0UL, profile_host_zoom_dictionary->size());
 404   }
 405
 406   ZoomLevelChangeObserver observer(browser()->profile());
 407   content::HostZoomMap* host_zoom_map = static_cast<content::HostZoomMap*>(
 408       content::HostZoomMap::GetDefaultForBrowserContext(
 409           browser()->profile()));
 410
 411   // Make sure that a change to a host zoom level doesn't propagate to the
 412   // profile prefs.
 413   std::string host3("host3");
 414   host_zoom_map->SetZoomLevelForHost(host3, 1.3);
 415   observer.BlockUntilZoomLevelForHostHasChanged(host3);
 416   EXPECT_THAT(GetHostsWithZoomLevelsFromPrefs(),
 417               testing::ElementsAre("host2", host3));
 418   {
 419     const base::DictionaryValue* profile_host_zoom_dictionary =
 420         profile_prefs->GetDictionary(prefs::kPerHostZoomLevelsDeprecated);
 421     EXPECT_EQ(0UL, profile_host_zoom_dictionary->size());
 422   }
 423
 424   // Make sure a change to the default zoom level doesn't propagate to the
 425   // profile prefs.
 426
 427   // First, we need a host at the default zoom level to respond when the
 428   // default zoom level changes.
 429   const double kNewDefaultZoomLevel = 1.5;
 430   GURL test_url = ConstructTestServerURL("http://host4:%u/");
 431   ui_test_utils::NavigateToURL(browser(), test_url);
 432   EXPECT_TRUE(content::ZoomValuesEqual(kOriginalDefaultZoomLevel,
 433                                        GetZoomLevel(test_url)));
 434
 435   // Change the default zoom level and observe.
 436   SetDefaultZoomLevel(kNewDefaultZoomLevel);
 437   observer.BlockUntilZoomLevelForHostHasChanged(test_url.host());
 438   EXPECT_TRUE(
 439       content::ZoomValuesEqual(kNewDefaultZoomLevel, GetZoomLevel(test_url)));
 440   EXPECT_EQ(kNewDefaultZoomLevel, zoom_level_prefs->GetDefaultZoomLevelPref());
 441   EXPECT_EQ(0.0, profile_prefs->GetDouble(prefs::kDefaultZoomLevelDeprecated));
 442 }
 443
 444 // Test four things:
 445 //  1. Host zoom maps of parent profile and child profile are different.
 446 //  2. Child host zoom map inherits zoom level at construction.
 447 //  3. Change of zoom level doesn't propagate from child to parent.
 448 //  4. Change of zoom level propagates from parent to child.
 449 IN_PROC_BROWSER_TEST_F(HostZoomMapBrowserTest,
 450                        OffTheRecordProfileHostZoomMap) {
 451   // Constants for test case.
 452   const std::string host("example.com");
 453   const double zoom_level_25 = 2.5;
 454   const double zoom_level_30 = 3.0;
 455   const double zoom_level_40 = 4.0;
 456
 457   Profile* parent_profile = browser()->profile();
 458   Profile* child_profile =
 459       static_cast<ProfileImpl*>(parent_profile)->GetOffTheRecordProfile();
 460   HostZoomMap* parent_zoom_map =
 461       HostZoomMap::GetDefaultForBrowserContext(parent_profile);
 462   ASSERT_TRUE(parent_zoom_map);
 463
 464   parent_zoom_map->SetZoomLevelForHost(host, zoom_level_25);
 465   ASSERT_EQ(parent_zoom_map->GetZoomLevelForHostAndScheme("http", host),
 466       zoom_level_25);
 467
 468   // Prepare child host zoom map.
 469   HostZoomMap* child_zoom_map =
 470       HostZoomMap::GetDefaultForBrowserContext(child_profile);
 471   ASSERT_TRUE(child_zoom_map);
 472
 473   // Verify.
 474   EXPECT_NE(parent_zoom_map, child_zoom_map);
 475
 476   EXPECT_EQ(parent_zoom_map->GetZoomLevelForHostAndScheme("http", host),
 477             child_zoom_map->GetZoomLevelForHostAndScheme("http", host)) <<
 478                 "Child must inherit from parent.";
 479
 480   child_zoom_map->SetZoomLevelForHost(host, zoom_level_30);
 481   ASSERT_EQ(
 482       child_zoom_map->GetZoomLevelForHostAndScheme("http", host),
 483       zoom_level_30);
 484
 485   EXPECT_NE(parent_zoom_map->GetZoomLevelForHostAndScheme("http", host),
 486             child_zoom_map->GetZoomLevelForHostAndScheme("http", host)) <<
 487                 "Child change must not propagate to parent.";
 488
 489   parent_zoom_map->SetZoomLevelForHost(host, zoom_level_40);
 490   ASSERT_EQ(
 491       parent_zoom_map->GetZoomLevelForHostAndScheme("http", host),
 492       zoom_level_40);
 493
 494   EXPECT_EQ(parent_zoom_map->GetZoomLevelForHostAndScheme("http", host),
 495             child_zoom_map->GetZoomLevelForHostAndScheme("http", host)) <<
 496                 "Parent change should propagate to child.";
 497   base::RunLoop().RunUntilIdle();
 498 }
 499
 500 IN_PROC_BROWSER_TEST_F(HostZoomMapBrowserTest,
 501                        ParentDefaultZoomPropagatesToIncognitoChild) {
 502   Profile* parent_profile = browser()->profile();
 503   Profile* child_profile =
 504       static_cast<ProfileImpl*>(parent_profile)->GetOffTheRecordProfile();
 505
 506   double new_default_zoom_level =
 507       parent_profile->GetZoomLevelPrefs()->GetDefaultZoomLevelPref() + 1.f;
 508   HostZoomMap* parent_host_zoom_map =
 509       HostZoomMap::GetDefaultForBrowserContext(parent_profile);
 510   HostZoomMap* child_host_zoom_map =
 511       HostZoomMap::GetDefaultForBrowserContext(child_profile);
 512   ASSERT_TRUE(parent_host_zoom_map);
 513   ASSERT_TRUE(child_host_zoom_map);
 514   EXPECT_NE(parent_host_zoom_map, child_host_zoom_map);
 515   EXPECT_NE(new_default_zoom_level, child_host_zoom_map->GetDefaultZoomLevel());
 516
 517   parent_profile->GetZoomLevelPrefs()->SetDefaultZoomLevelPref(
 518       new_default_zoom_level);
 519   EXPECT_EQ(new_default_zoom_level, child_host_zoom_map->GetDefaultZoomLevel());
 520 }