Add runtime setting to force passive event listeners.

content/public/common/content_switches.h

 // 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.
 
 // Defines all the "content" command-line switches.
 
 #ifndef CONTENT_PUBLIC_COMMON_CONTENT_SWITCHES_H_
 #define CONTENT_PUBLIC_COMMON_CONTENT_SWITCHES_H_
 
 #include "build/build_config.h"
@@ skipping 177 matching lines @@
 extern const char kMemoryMetrics[];
 CONTENT_EXPORT extern const char kMojoLocalStorage[];
 CONTENT_EXPORT extern const char kMuteAudio[];
 CONTENT_EXPORT extern const char kNoReferrers[];
 CONTENT_EXPORT extern const char kNoSandbox[];
 CONTENT_EXPORT extern const char kEnableAppContainer[];
 CONTENT_EXPORT extern const char kDisableAppContainer[];
 CONTENT_EXPORT extern const char kNumRasterThreads[];
 CONTENT_EXPORT extern const char kOverridePluginPowerSaverForTesting[];
 CONTENT_EXPORT extern const char kOverscrollHistoryNavigation[];
+CONTENT_EXPORT extern const char kPassiveListenersDefault[];
 CONTENT_EXPORT extern const char kPpapiBrokerProcess[];
 CONTENT_EXPORT extern const char kPpapiFlashArgs[];
 CONTENT_EXPORT extern const char kPpapiInProcess[];
 extern const char kPpapiPluginLauncher[];
 CONTENT_EXPORT extern const char kPpapiPluginProcess[];
 extern const char kPpapiStartupDialog[];
 CONTENT_EXPORT extern const char kProcessPerSite[];
 CONTENT_EXPORT extern const char kProcessPerTab[];
 CONTENT_EXPORT extern const char kProcessType[];
 CONTENT_EXPORT extern const char kReduceSecurityForTesting[];
@@ skipping 95 matching lines @@
 CONTENT_EXPORT extern const char kMemoryPressureThresholdsMb[];
 CONTENT_EXPORT extern const char kTraceExportEventsToETW[];
 #endif
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace switches
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_SWITCHES_H_