Add the "experimental canvas features" flag, and plumb it through to

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 810 matching lines @@
     switches::kDisableSpeechInput,
     switches::kDisableTouchDragDrop,
     switches::kDisableTouchEditing,
 #if defined(OS_ANDROID)
     switches::kEnableWebAudio,
     switches::kDisableWebRTC,
 #else
     switches::kDisableWebAudio,
 #endif
     switches::kEnableWebMIDI,
+    switches::kEnableExperimentalCanvasFeatures,
     switches::kEnableExperimentalWebSocket,
     switches::kDomAutomationController,
     switches::kEnableAccessibilityLogging,
     switches::kEnableBrowserPluginForAllViewTypes,
     switches::kEnableDCHECK,
     switches::kEnableDelegatedRenderer,
     switches::kDisableEncryptedMedia,
     switches::kEnableExperimentalWebKitFeatures,
     switches::kEnableFixedLayout,
     switches::kEnableDeferredImageDecoding,
@@ skipping 899 matching lines @@
   TRACE_EVENT0("renderer_host",
                "RenderWidgetHostImpl::OnCompositorSurfaceBuffersSwappedNoHost");
   AcceleratedSurfaceMsg_BufferPresented_Params ack_params;
   ack_params.sync_point = 0;
   RenderWidgetHostImpl::AcknowledgeBufferPresent(route_id,
                                                  gpu_process_host_id,
                                                  ack_params);
 }
 
 }  // namespace content