Convert USE(NATIVE_FULLSCREEN_VIDEO) to a runtime enabled feature

content/public/common/content_switches.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 "content/public/common/content_switches.h"
 
 namespace switches {
 
 // By default, file:// URIs cannot read other file:// URIs. This is an
 // override for developers who need the old behavior for testing.
@@ skipping 430 matching lines @@
 const char kEnableMemoryBenchmarking[]      = "enable-memory-benchmarking";
 
 // On Windows, converts the page to the currently-installed monitor profile.
 // This does NOT enable color management for images. The source is still
 // assumed to be sRGB.
 const char kEnableMonitorProfile[]          = "enable-monitor-profile";
 
 // Enables use of cache if offline, even if it's stale
 const char kEnableOfflineCacheAccess[]      = "enable-offline-cache-access";
 
+// Enables use of hardware overlay for fullscreen video playback. Android only.
+const char kEnableOverlayFullscreenVideo[]  = "enable-overlay-fullscreen-video";
+
 // Enables overlay scrollbars on Aura or Linux. Does nothing on Mac.
 const char kEnableOverlayScrollbars[]       = "enable-overlay-scrollbars";
 
 // Forward overscroll event data from the renderer to the browser.
 const char kEnableOverscrollNotifications[] = "enable-overscroll-notifications";
 
 // Enables compositor-accelerated touch-screen pinch gestures.
 const char kEnablePinch[]                   = "enable-pinch";
 
 // Enable caching of pre-parsed JS script data.  See http://crbug.com/32407.
@@ skipping 509 matching lines @@
 #endif
 
 #if defined(USE_AURA)
 // Forces usage of the test compositor. Needed to run ui tests on bots.
 extern const char kTestCompositor[]         = "test-compositor";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches