chrome/browser/browser_features.h

   1 // Copyright 2018 The Chromium Authors
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // This file defines the browser-specific base::FeatureList features that are
   6 // not shared with other process types.
   7
   8 #ifndef CHROME_BROWSER_BROWSER_FEATURES_H_
   9 #define CHROME_BROWSER_BROWSER_FEATURES_H_
  10
  11 #include "base/feature_list.h"
  12 #include "base/metrics/field_trial_params.h"
  13 #include "build/build_config.h"
  14 #include "build/chromeos_buildflags.h"
  15
  16 namespace features {
  17
  18 // All features in alphabetical order. The features should be documented
  19 // alongside the definition of their values in the .cc file.
  20
  21 BASE_DECLARE_FEATURE(kClosedTabCache);
  22
  23 BASE_DECLARE_FEATURE(kDestroyProfileOnBrowserClose);
  24 BASE_DECLARE_FEATURE(kDestroySystemProfiles);
  25
  26 BASE_DECLARE_FEATURE(kDevToolsTabTarget);
  27 BASE_DECLARE_FEATURE(kDevToolsVeLogging);
  28
  29 BASE_DECLARE_FEATURE(kNukeProfileBeforeCreateMultiAsync);
  30
  31 BASE_DECLARE_FEATURE(kPromoBrowserCommands);
  32 extern const char kBrowserCommandIdParam[];
  33
  34 #if BUILDFLAG(IS_CHROMEOS_ASH)
  35 BASE_DECLARE_FEATURE(kQuickSettingsPWANotifications);
  36 #endif
  37
  38 #if BUILDFLAG(IS_CHROMEOS)
  39 BASE_DECLARE_FEATURE(kDoubleTapToZoomInTabletMode);
  40 #endif
  41
  42 #if !BUILDFLAG(IS_ANDROID)
  43 BASE_DECLARE_FEATURE(kCopyLinkToText);
  44 BASE_DECLARE_FEATURE(kMuteNotificationSnoozeAction);
  45 #endif
  46
  47 BASE_DECLARE_FEATURE(kSandboxExternalProtocolBlocked);
  48 BASE_DECLARE_FEATURE(kSandboxExternalProtocolBlockedWarning);
  49 BASE_DECLARE_FEATURE(kTriggerNetworkDataMigration);
  50
  51 #if BUILDFLAG(IS_CHROMEOS)
  52 BASE_DECLARE_FEATURE(kTabCaptureBlueBorderCrOS);
  53 #endif
  54
  55 BASE_DECLARE_FEATURE(kWebUsbDeviceDetection);
  56
  57 BASE_DECLARE_FEATURE(kCertificateTransparencyAskBeforeEnabling);
  58
  59 BASE_DECLARE_FEATURE(kLargeFaviconFromGoogle);
  60 extern const base::FeatureParam<int> kLargeFaviconFromGoogleSizeInDip;
  61
  62 BASE_DECLARE_FEATURE(kRestartNetworkServiceUnsandboxedForFailedLaunch);
  63
  64 BASE_DECLARE_FEATURE(kKeyPinningComponentUpdater);
  65
  66 #if BUILDFLAG(IS_WIN)
  67 BASE_DECLARE_FEATURE(kAppBoundEncryptionMetrics);
  68 BASE_DECLARE_FEATURE(kLockProfileCookieDatabase);
  69 BASE_DECLARE_FEATURE(kNoPreReadMainDll);
  70 #endif
  71
  72 BASE_DECLARE_FEATURE(kFlexOrgManagementDisclosure);
  73
  74 BASE_DECLARE_FEATURE(kFedCmWithoutThirdPartyCookies);
  75
  76 BASE_DECLARE_FEATURE(kIncomingCallNotifications);
  77
  78 // This flag is used for enabling Omnibox triggered prerendering. See
  79 // crbug.com/1166085 for more details of Omnibox triggered prerendering.
  80 BASE_DECLARE_FEATURE(kOmniboxTriggerForPrerender2);
  81
  82 // This flag is used for enabling Bookmark triggered prerendering. See
  83 // crbug.com/1422819 for more details of Bookmark triggered prerendering.
  84 BASE_DECLARE_FEATURE(kBookmarkTriggerForPrerender2);
  85
  86 // This flag is used for enabling New Tab Page triggered prerendering. See
  87 // crbug.com/1462832 for more details of New Tab Page triggered prerendering.
  88 BASE_DECLARE_FEATURE(kNewTabPageTriggerForPrerender2);
  89 // This parameter is used to set a time threshold for triggering onMouseHover
  90 // prerender. For example, if the value is 300, the New Tab Page prerender
  91 // will start after 300ms after mouseHover duration is over 300ms.
  92 const base::FeatureParam<int>
  93     kNewTabPagePrerenderStartDelayOnMouseHoverByMiliSeconds{
  94         &features::kNewTabPageTriggerForPrerender2,
  95         "prerender_start_delay_on_mouse_hover_ms", 300};
  96
  97 // This flag controls whether to trigger prerendering when the default search
  98 // engine suggests to prerender a search result.
  99 BASE_DECLARE_FEATURE(kSupportSearchSuggestionForPrerender2);
 100 // Indicates whether to make search prefetch response shareable to prerender.
 101 // When allowing this, prerender can only copy the cache but cannot take over
 102 // the ownership.
 103 enum class SearchPreloadShareableCacheType {
 104   kEnabled,
 105   kDisabled,
 106 };
 107
 108 extern const base::FeatureParam<SearchPreloadShareableCacheType>
 109     kSearchPreloadShareableCacheTypeParam;
 110
 111 // Disables prerendering on the default search engine predictor. This is useful
 112 // in comparing the impact of the SupportSearchSuggestionForPrerender2 feature
 113 // during its rollout. Once that rollout is complete, this feature should be
 114 // removed and instead we should add a new long-term holdback to
 115 // PreloadingConfig.
 116 BASE_DECLARE_FEATURE(kPrerenderDSEHoldback);
 117
 118 // This is used to enable an experiment for modifying confidence cutoff of
 119 // prerender and preconnect for autocomplete action predictor.
 120 BASE_DECLARE_FEATURE(kAutocompleteActionPredictorConfidenceCutoff);
 121
 122 BASE_DECLARE_FEATURE(kOmniboxTriggerForNoStatePrefetch);
 123
 124 #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_MAC) || BUILDFLAG(IS_WIN)
 125 BASE_DECLARE_FEATURE(kPayloadTestComponent);
 126 #endif
 127
 128 }  // namespace features
 129
 130 #endif  // CHROME_BROWSER_BROWSER_FEATURES_H_