Add a chrome://flags entry for experimental productivity features

Bug: 837344
Change-Id: Ie1367ed1c12c714bad4d6aa28aa989b2a712c309
Reviewed-on: https://chromium-review.googlesource.com/1030841
Commit-Queue: Ian Clelland <iclelland@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#555968}

chrome/browser/about_flags.cc

@@ -3897,6 +3897,10 @@ const FeatureEntry kFeatureEntries[] = {
     {"enable-sync-uss-sessions", flag_descriptions::kEnableSyncUSSSessionsName,
      flag_descriptions::kEnableSyncUSSSessionsDescription, kOsAll,
      FEATURE_VALUE_TYPE(switches::kSyncUSSSessions)},
+    {"enable-experimental-productivity-features",
+     flag_descriptions::kExperimentalProductivityFeaturesName,
+     flag_descriptions::kExperimentalProductivityFeaturesDescription, kOsAll,
+     FEATURE_VALUE_TYPE(features::kExperimentalProductivityFeatures)},
 
 #if defined(OS_CHROMEOS)
     {"enable-overview-swipe-to-close",

chrome/browser/flag_descriptions.cc

@@ -707,6 +707,12 @@ const char kExperimentalKeyboardLockUiDescription[] =
     "An experimental full screen with keyboard lock mode requiring users to "
     "hold Esc to exit.";
 
+const char kExperimentalProductivityFeaturesName[] =
+    "Experimental Productivity Features";
+const char kExperimentalProductivityFeaturesDescription[] =
+    "Enable support for experimental developer productivity features, such as "
+    "Layered APIs and policies for avoiding slow rendering.";
+
 const char kExperimentalSecurityFeaturesName[] =
     "Potentially annoying security features";
 const char kExperimentalSecurityFeaturesDescription[] =

chrome/browser/flag_descriptions.h

@@ -455,6 +455,9 @@ extern const char kExperimentalFullscreenExitUIDescription[];
 extern const char kExperimentalKeyboardLockUiName[];
 extern const char kExperimentalKeyboardLockUiDescription[];
 
+extern const char kExperimentalProductivityFeaturesName[];
+extern const char kExperimentalProductivityFeaturesDescription[];
+
 extern const char kExperimentalSecurityFeaturesName[];
 extern const char kExperimentalSecurityFeaturesDescription[];
 

content/child/runtime_features.cc

@@ -440,6 +440,11 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
   WebRuntimeFeatures::EnableOffMainThreadWebSocket(
       base::FeatureList::IsEnabled(features::kOffMainThreadWebSocket));
 
+  if (base::FeatureList::IsEnabled(
+          features::kExperimentalProductivityFeatures)) {
+    WebRuntimeFeatures::EnableExperimentalProductivityFeatures(true);
+  }
+
   // End individual features.
   // Do not add individual features below this line.
 

content/public/common/content_features.cc

@@ -499,6 +499,10 @@ const base::Feature kWebAuthCtap2{"WebAuthenticationCtap2",
 const base::Feature kWebGLImageChromium{"WebGLImageChromium",
                                         base::FEATURE_ENABLED_BY_DEFAULT};
 
+// Enable experimental policy-controlled features and LAPIs
+const base::Feature kExperimentalProductivityFeatures{
+    "ExperimentalProductivityFeatures", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // The JavaScript API for payments on the web.
 const base::Feature kWebPayments{"WebPayments",
                                  base::FEATURE_ENABLED_BY_DEFAULT};

content/public/common/content_features.h

@@ -34,6 +34,7 @@ CONTENT_EXPORT extern const base::Feature kCompositorTouchAction;
 CONTENT_EXPORT extern const base::Feature kCrossSiteDocumentBlockingAlways;
 CONTENT_EXPORT extern const base::Feature kCrossSiteDocumentBlockingIfIsolating;
 CONTENT_EXPORT extern const base::Feature kDataSaverHoldback;
+CONTENT_EXPORT extern const base::Feature kExperimentalProductivityFeatures;
 CONTENT_EXPORT extern const base::Feature kExpensiveBackgroundTimerThrottling;
 CONTENT_EXPORT extern const base::Feature kExtendedMouseButtons;
 CONTENT_EXPORT extern const base::Feature kFontCacheScaling;

third_party/blink/public/platform/web_runtime_features.h

@@ -188,6 +188,8 @@ class WebRuntimeFeatures {
   BLINK_PLATFORM_EXPORT static void EnableUnifiedTouchAdjustment(bool);
   BLINK_PLATFORM_EXPORT static void EnableMojoBlobURLs(bool);
   BLINK_PLATFORM_EXPORT static void EnableOffMainThreadWebSocket(bool);
+  BLINK_PLATFORM_EXPORT static void EnableExperimentalProductivityFeatures(
+      bool);
 
  private:
   WebRuntimeFeatures();

third_party/blink/renderer/platform/exported/web_runtime_features.cc

@@ -516,4 +516,8 @@ void WebRuntimeFeatures::EnableOffMainThreadWebSocket(bool enable) {
   RuntimeEnabledFeatures::SetOffMainThreadWebSocketEnabled(enable);
 }
 
+void WebRuntimeFeatures::EnableExperimentalProductivityFeatures(bool enable) {
+  RuntimeEnabledFeatures::SetExperimentalProductivityFeaturesEnabled(enable);
+}
+
 }  // namespace blink

tools/metrics/histograms/enums.xml

@@ -26291,6 +26291,7 @@ from previous Chrome versions.
   <int value="-2119827860" label="ash-disable-maximize-mode-window-backdrop"/>
   <int value="-2119530966" label="enable-webrtc-dtls12"/>
   <int value="-2119493239" label="enable-app-info-dialog-mac"/>
+  <int value="-2117621241" label="ExperimentalProductivityFeatures:enabled"/>
   <int value="-2117201726" label="disable-gpu-rasterization"/>
   <int value="-2114831248" label="disable-new-ntp"/>
   <int value="-2113705745"
@@ -26521,6 +26522,7 @@ from previous Chrome versions.
   <int value="-1653838003" label="PauseBackgroundTabs:enabled"/>
   <int value="-1649778035" label="disable-clear-browsing-data-counters"/>
   <int value="-1648216169" label="NewOmniboxAnswerTypes:disabled"/>
+  <int value="-1638815914" label="enable-experimental-productivity-features"/>
   <int value="-1634878515" label="ChromeHomeModernLayout:enabled"/>
   <int value="-1634154256" label="ZeroSuggestRedirectToChrome:enabled"/>
   <int value="-1633586675" label="TabModalJsDialog:enabled"/>
@@ -26942,6 +26944,7 @@ from previous Chrome versions.
   <int value="-738957187" label="OmniboxUIExperimentSwapTitleAndUrl:disabled"/>
   <int value="-723224470" label="enable-password-force-saving:enabled"/>
   <int value="-722474177" label="browser-side-navigation:disabled"/>
+  <int value="-719147284" label="ExperimentalProductivityFeatures:disabled"/>
   <int value="-718884399" label="NewTabPageUIMd:enabled"/>
   <int value="-718626298" label="SysInternals:enabled"/>
   <int value="-716953514" label="disable-password-separated-signin-flow"/>