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.
5 // A handful of resource-like constants related to the Content application.
7 #ifndef CONTENT_PUBLIC_COMMON_CONTENT_CONSTANTS_H_
8 #define CONTENT_PUBLIC_COMMON_CONTENT_CONSTANTS_H_
10 #include <stddef.h> // For size_t
12 #include "base/files/file_path.h"
13 #include "content/common/content_export.h"
17 // The name of the directory under BrowserContext::GetPath where the AppCache is
19 CONTENT_EXPORT extern const base::FilePath::CharType kAppCacheDirname[];
20 // The name of the directory under BrowserContext::GetPath where Pepper plugin
22 CONTENT_EXPORT extern const base::FilePath::CharType kPepperDataDirname[];
24 // The MIME type used for the browser plugin.
25 CONTENT_EXPORT extern const char kBrowserPluginMimeType[];
27 CONTENT_EXPORT extern const char kFlashPluginName[];
28 CONTENT_EXPORT extern const char kFlashPluginSwfMimeType[];
29 CONTENT_EXPORT extern const char kFlashPluginSwfExtension[];
30 CONTENT_EXPORT extern const char kFlashPluginSwfDescription[];
31 CONTENT_EXPORT extern const char kFlashPluginSplMimeType[];
32 CONTENT_EXPORT extern const char kFlashPluginSplExtension[];
33 CONTENT_EXPORT extern const char kFlashPluginSplDescription[];
35 CONTENT_EXPORT extern const size_t kMaxRendererProcessCount;
37 // The maximum number of session history entries per tab.
38 extern const int kMaxSessionHistoryEntries;
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;
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;
53 extern const char kStatsFilename[];
54 extern const int kStatsMaxThreads;
55 extern const int kStatsMaxCounters;
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;
64 // Shared constants for the low latency flash audio field trial.
65 CONTENT_EXPORT extern const char kLowLatencyFlashAudioFieldTrialName[];
66 CONTENT_EXPORT extern const char kLowLatencyFlashAudioFieldTrialEnabledName[];
68 } // namespace content
70 #endif // CONTENT_PUBLIC_COMMON_CONTENT_CONSTANTS_H_