Add runtime setting to force passive event listeners.

chrome/browser/about_flags.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 167 matching lines @@
   // so by default we want to avoid debugging that.
   // NOTE: As the default value must be the empty string, the mask excluding
   // the PNaCl translator and secure shell is substituted elsewhere.
   { IDS_NACL_DEBUG_MASK_CHOICE_EXCLUDE_UTILS_PNACL, "", "" },
   { IDS_NACL_DEBUG_MASK_CHOICE_DEBUG_ALL, switches::kNaClDebugMask, "*://*" },
   { IDS_NACL_DEBUG_MASK_CHOICE_INCLUDE_DEBUG,
       switches::kNaClDebugMask, "*://*/*debug.nmf" }
 };
 #endif
 
+const FeatureEntry::Choice kPassiveListenersChoices[] = {
+    {IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", ""},
+    {IDS_FLAGS_PASSIVE_EVENT_LISTENER_DOCUMENT_TRUE,
+     switches::kPassiveListenersDefault, "documentonlytrue"},
+    {IDS_FLAGS_PASSIVE_EVENT_LISTENER_TRUE, switches::kPassiveListenersDefault,
+     "true"},
+    {IDS_FLAGS_PASSIVE_EVENT_LISTENER_FORCE_ALL_TRUE,
+     switches::kPassiveListenersDefault, "forcealltrue"},
+};
+
 const FeatureEntry::Choice kMarkNonSecureAsChoices[] = {
     {IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", ""},
     {IDS_MARK_NON_SECURE_AS_NEUTRAL, security_state::switches::kMarkNonSecureAs,
      security_state::switches::kMarkNonSecureAsNeutral},
     {IDS_MARK_NON_SECURE_AS_NON_SECURE,
      security_state::switches::kMarkNonSecureAs,
      security_state::switches::kMarkNonSecureAsNonSecure}};
 
 const FeatureEntry::Choice kDataReductionProxyLoFiChoices[] = {
     { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
@@ skipping 677 matching lines @@
     {
         "disable-touch-feedback", IDS_FLAGS_TOUCH_FEEDBACK_NAME,
         IDS_FLAGS_TOUCH_FEEDBACK_DESCRIPTION, kOsCrOS,
         SINGLE_DISABLE_VALUE_TYPE(switches::kDisableTouchFeedback),
     },
     {
         "ash-enable-mirrored-screen", IDS_FLAGS_ASH_ENABLE_MIRRORED_SCREEN_NAME,
         IDS_FLAGS_ASH_ENABLE_MIRRORED_SCREEN_DESCRIPTION, kOsCrOS,
         SINGLE_VALUE_TYPE(ash::switches::kAshEnableMirroredScreen),
     },
-    {
-        "ash-md", IDS_FLAGS_ASH_MD, IDS_FLAGS_ASH_MD_DESCRIPTION, kOsCrOS,
-        MULTI_VALUE_TYPE(kAshMaterialDesignChoices)},
+    {"ash-md", IDS_FLAGS_ASH_MD, IDS_FLAGS_ASH_MD_DESCRIPTION, kOsCrOS,
+     MULTI_VALUE_TYPE(kAshMaterialDesignChoices)},
     {
         "ash-stable-overview-order", IDS_FLAGS_ASH_STABLE_OVERVIEW_ORDER_NAME,
         IDS_FLAGS_ASH_STABLE_OVERVIEW_ORDER_DESCRIPTION, kOsCrOS,
         ENABLE_DISABLE_VALUE_TYPE(
             ash::switches::kAshEnableStableOverviewOrder,
             ash::switches::kAshDisableStableOverviewOrder),
     },
 #endif  // defined(USE_ASH)
 #if defined(OS_CHROMEOS)
     {"material-design-ink-drop-animation-speed",
@@ skipping 623 matching lines @@
      IDS_FLAGS_TRY_SUPPORTED_CHANNEL_LAYOUTS_NAME,
      IDS_FLAGS_TRY_SUPPORTED_CHANNEL_LAYOUTS_DESCRIPTION, kOsWin,
      SINGLE_VALUE_TYPE(switches::kTrySupportedChannelLayouts)},
 #endif
 #if defined(ENABLE_WEBRTC)
     {"enable-webrtc-dtls12", IDS_FLAGS_WEBRTC_DTLS12_NAME,
      IDS_FLAGS_WEBRTC_DTLS12_DESCRIPTION, kOsAll,
      SINGLE_VALUE_TYPE(switches::kEnableWebRtcDtls12)},
 #endif
 #if defined(ENABLE_WEBRTC)
-    {"enable-webrtc-ecdsa",
-     IDS_FLAGS_WEBRTC_ECDSA_NAME,
+    {"enable-webrtc-ecdsa", IDS_FLAGS_WEBRTC_ECDSA_NAME,
      IDS_FLAGS_WEBRTC_ECDSA_DESCRIPTION, kOsAll,
      FEATURE_VALUE_TYPE(features::kWebRtcEcdsaDefault)},
 #endif
 #if defined(OS_MACOSX)
     {"app-info-dialog", IDS_FLAGS_APP_INFO_DIALOG_NAME,
      IDS_FLAGS_APP_INFO_DIALOG_DESCRIPTION, kOsMac,
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableAppInfoDialogMac,
                                switches::kDisableAppInfoDialogMac)},
     {"mac-views-native-app-windows",
      IDS_FLAGS_MAC_VIEWS_NATIVE_APP_WINDOWS_NAME,
@@ skipping 285 matching lines @@
      IDS_FLAGS_GOOGLE_BRANDED_CONTEXT_MENU_DESCRIPTION, kOsDesktop,
      SINGLE_VALUE_TYPE(switches::kEnableGoogleBrandedContextMenu)},
 #endif
 #if defined(OS_MACOSX)
     {"enable-fullscreen-in-tab-detaching",
      IDS_FLAGS_TAB_DETACHING_IN_FULLSCREEN_NAME,
      IDS_FLAGS_TAB_DETACHING_IN_FULLSCREEN_DESCRIPTION, kOsMac,
      SINGLE_VALUE_TYPE(switches::kEnableFullscreenTabDetaching)},
 #endif
 #if defined(OS_ANDROID)
-    {"media-style-notification",
-     IDS_FLAGS_MEDIA_STYLE_NOTIFICATION_NAME,
+    {"media-style-notification", IDS_FLAGS_MEDIA_STYLE_NOTIFICATION_NAME,
      IDS_FLAGS_MEDIA_STYLE_NOTIFICATION_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kMediaStyleNotification)},
-    {"important-sites-in-cbd",
-     IDS_FLAGS_IMPORTANT_SITES_IN_CBD_NAME,
+    {"important-sites-in-cbd", IDS_FLAGS_IMPORTANT_SITES_IN_CBD_NAME,
      IDS_FLAGS_IMPORTANT_SITES_IN_CBD_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kImportantSitesInCBD)},
 #endif
     {"enable-pointer-events",  // FLAGS:RECORD_UMA
-      IDS_FLAGS_EXPERIMENTAL_POINTER_EVENT_NAME,
-      IDS_FLAGS_EXPERIMENTAL_POINTER_EVENT_DESCRIPTION,
-      kOsAll,
-      FEATURE_VALUE_TYPE(features::kPointerEvents)},
+     IDS_FLAGS_EXPERIMENTAL_POINTER_EVENT_NAME,
+     IDS_FLAGS_EXPERIMENTAL_POINTER_EVENT_DESCRIPTION, kOsAll,
+     FEATURE_VALUE_TYPE(features::kPointerEvents)},
+    {"passive-listener-default",  // FLAGS:RECORD_UMA
+     IDS_FLAGS_PASSIVE_EVENT_LISTENER_DEFAULT_NAME,
+     IDS_FLAGS_PASSIVE_EVENT_LISTENER_DEFAULT_DESCRIPTION, kOsAll,
+     MULTI_VALUE_TYPE(kPassiveListenersChoices)},
+
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms.xml. See note in
     // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.
 };
 
 class FlagsStateSingleton {
  public:
   FlagsStateSingleton()
       : flags_state_(kFeatureEntries, arraysize(kFeatureEntries)) {}
   ~FlagsStateSingleton() {}
@@ skipping 179 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags