Add a flag to disable partial raster in renderer

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 {
 
 // The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
 // have an effect. 0 disables MSAA.
@@ skipping 186 matching lines @@
 
 // Disables the Web Notification and the Push APIs.
 const char kDisableNotifications[]          = "disable-notifications";
 
 // Disable Pepper3D.
 const char kDisablePepper3d[]               = "disable-pepper-3d";
 
 // Disables the Permissions API.
 const char kDisablePermissionsAPI[]         = "disable-permissions-api";
 
-// Disables the use of persistent GPU memory buffers for partial raster.
-const char kDisablePersistentGpuMemoryBuffer[] =
-    "disable-persistent-gpu-memory-buffer";
-
 // Disables compositor-accelerated touch-screen pinch gestures.
 const char kDisablePinch[]                  = "disable-pinch";
 
 // Disable discovering third-party plugins. Effectively loading only
 // ones shipped with the browser plus third-party ones as specified by
 // --extra-plugin-dir and --load-plugin switches.
 const char kDisablePluginsDiscovery[]       = "disable-plugins-discovery";
 
 // Disables the Presentation API.
 const char kDisablePresentationAPI[]        = "disable-presentation-api";
@@ skipping 145 matching lines @@
 // Force logging to be enabled.  Logging is disabled by default in release
 // builds.
 const char kEnableLogging[]                 = "enable-logging";
 
 // Enables the memory benchmarking extension
 const char kEnableMemoryBenchmarking[]      = "enable-memory-benchmarking";
 
 // Enables the network information API.
 const char kEnableNetworkInformation[]      = "enable-network-information";
 
-// Enables the use of persistent GPU memory buffers for partial raster.
-const char kEnablePersistentGpuMemoryBuffer[] =
-    "enable-persistent-gpu-memory-buffer";
+// Enables partial raster. Enabling this switch also enables the use of
+// persistent gpu memory buffers.
+const char kEnablePartialRaster[] = "enable-partial-raster";
 
 // Enables compositor-accelerated touch-screen pinch gestures.
 const char kEnablePinch[]                   = "enable-pinch";
 
 // Enables testing features of the Plugin Placeholder. For internal use only.
 const char kEnablePluginPlaceholderTesting[] =
     "enable-plugin-placeholder-testing";
 
 // Make the values returned to window.performance.memory more granular and more
 // up to date in shared worker. Without this flag, the memory information is
@@ skipping 582 matching lines @@
 const char kMemoryPressureThresholdsMb[] = "memory-pressure-thresholds-mb";
 
 // Enables the exporting of the tracing events to ETW. This is only supported on
 // Windows Vista and later.
 const char kTraceExportEventsToETW[] = "trace-export-events-to-etw";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches