Add a flag to allow renderer to use software compositor when GL compositor doesn't work.

content/browser/renderer_host/render_process_host_impl.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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 868 matching lines @@
     switches::kDisableBreakpad,
     switches::kDisableDatabases,
     switches::kDisableDelegatedRenderer,
     switches::kDisableDesktopNotifications,
     switches::kDisableDeviceOrientation,
     switches::kDisableFileSystem,
     switches::kDisableGeolocation,
     switches::kDisableGLMultisampling,
     switches::kDisableGpuVsync,
     switches::kDisableGpu,
+    switches::kDisableGpuCompositing,
     switches::kDisableHistogramCustomizer,
     switches::kDisableLocalStorage,
     switches::kDisableLogging,
     switches::kDisableNewDialogStyle,
     switches::kDisableSeccompFilterSandbox,
     switches::kDisableSessionStorage,
     switches::kDisableSharedWorkers,
     switches::kDisableSpeechInput,
     switches::kDisableTouchDragDrop,
     switches::kDisableTouchEditing,
@@ skipping 49 matching lines @@
     switches::kDisablePepper3d,
 #endif
     switches::kEnablePreparsedJsCaching,
     switches::kEnablePruneGpuCommandBuffers,
     switches::kEnablePinch,
     switches::kDisablePinch,
 #if defined(OS_MACOSX)
     // Allow this to be set when invoking the browser and relayed along.
     switches::kEnableSandboxLogging,
 #endif
-    switches::kEnableSoftwareCompositingGLAdapter,
+    switches::kEnableSoftwareCompositing,
     switches::kEnableStatsTable,
     switches::kEnableThreadedCompositing,
     switches::kEnableCompositingForFixedPosition,
     switches::kEnableHighDpiCompositingForFixedPosition,
     switches::kDisableCompositingForFixedPosition,
     switches::kEnableAcceleratedOverflowScroll,
     switches::kEnableCompositingForTransition,
     switches::kDisableCompositingForTransition,
     switches::kEnableAcceleratedFixedRootBackground,
     switches::kDisableAcceleratedFixedRootBackground,
@@ skipping 830 matching lines @@
     // Skip widgets in other processes.
     if (widgets[i]->GetProcess()->GetID() != GetID())
       continue;
 
     RenderViewHost* rvh = RenderViewHost::From(widgets[i]);
     rvh->UpdateWebkitPreferences(rvh->GetWebkitPreferences());
   }
 }
 
 }  // namespace content