content/public/common/content_constants.h

   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 // A handful of resource-like constants related to the Content application.
   6
   7 #ifndef CONTENT_PUBLIC_COMMON_CONTENT_CONSTANTS_H_
   8 #define CONTENT_PUBLIC_COMMON_CONTENT_CONSTANTS_H_
   9
  10 #include <stddef.h>         // For size_t
  11
  12 #include "base/file_path.h"
  13 #include "content/common/content_export.h"
  14
  15 namespace content {
  16
  17 // The name of the directory under BrowserContext::GetPath where the AppCache is
  18 // put.
  19 CONTENT_EXPORT extern const FilePath::CharType kAppCacheDirname[];
  20 // The name of the directory under BrowserContext::GetPath where Pepper plugin
  21 // data is put.
  22 CONTENT_EXPORT extern const FilePath::CharType kPepperDataDirname[];
  23 // The name of the directory under BrowserContext::GetPath() where renderers
  24 // with a non-default storage partition keep their persistent state. This will
  25 // contain a set of directories that partially mirror the directory structure
  26 // of BrowserContext::GetPath().
  27 CONTENT_EXPORT extern const FilePath::CharType kStoragePartitionDirname[];
  28
  29 // The MIME type used for the browser plugin.
  30 CONTENT_EXPORT extern const char kBrowserPluginMimeType[];
  31 // TODO(fsamuel): Remove this once upstreaming of the new browser plugin is
  32 // complete.
  33 CONTENT_EXPORT extern const char kBrowserPluginNewMimeType[];
  34
  35 CONTENT_EXPORT extern const size_t kMaxRendererProcessCount;
  36
  37 // The maximum number of session history entries per tab.
  38 extern const int kMaxSessionHistoryEntries;
  39
  40 // The maximum number of characters of the document's title that we're willing
  41 // to accept in the browser process.
  42 extern const size_t kMaxTitleChars;
  43
  44 // The maximum number of characters in the URL that we're willing to accept
  45 // in the browser process. It is set low enough to avoid damage to the browser
  46 // but high enough that a web site can abuse location.hash for a little storage.
  47 // We have different values for "max accepted" and "max displayed" because
  48 // a data: URI may be legitimately massive, but the full URI would kill all
  49 // known operating systems if you dropped it into a UI control.
  50 CONTENT_EXPORT extern const size_t kMaxURLChars;
  51 CONTENT_EXPORT extern const size_t kMaxURLDisplayChars;
  52
  53 extern const char kStatsFilename[];
  54 extern const int kStatsMaxThreads;
  55 extern const int kStatsMaxCounters;
  56
  57 // Most sequence numbers are used by a renderer when responding to a browser
  58 // request for histogram data.  This reserved number is used when a renderer
  59 // sends an unprovoked update, such as after a page has been loaded.  Using
  60 // this reserved constant avoids any chance of confusion with a response having
  61 // a browser-supplied sequence number.
  62 CONTENT_EXPORT extern const int kHistogramSynchronizerReservedSequenceNumber;
  63
  64 CONTENT_EXPORT extern const char kGpuCompositingFieldTrialName[];
  65 CONTENT_EXPORT extern const char
  66     kGpuCompositingFieldTrialForceCompositingEnabledName[];
  67 CONTENT_EXPORT extern const char kGpuCompositingFieldTrialThreadEnabledName[];
  68
  69 }  // namespace content
  70
  71 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_CONSTANTS_H_