Add flag to disable impl-side painting

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index bb762629a254f4f86a4cd356338fb0394cb557a5..3702602cfc582ebc6c995bfacc2a2880435c4e02 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -37,6 +37,7 @@
 #include "base/threading/thread_restrictions.h"
 #include "base/tracked_objects.h"
 #include "cc/switches.h"
+#include "cc/util.h"
 #include "content/browser/appcache/appcache_dispatcher_host.h"
 #include "content/browser/appcache/chrome_appcache_service.h"
 #include "content/browser/browser_main.h"
@@ -845,6 +846,7 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
     switches::kWebIntentsInvocationEnabled,
     cc::switches::kBackgroundColorInsteadOfCheckerboard,
     cc::switches::kEnableCompositorFrameMessage,
+    cc::switches::kDisableImplSidePainting,
     cc::switches::kEnableImplSidePainting,
     cc::switches::kEnablePartialSwap,
     cc::switches::kEnableRightAlignedScheduling,
@@ -874,7 +876,7 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
   }
 
   // Enforce the extra command line flags for impl-side painting.
-  if (browser_cmd.HasSwitch(cc::switches::kEnableImplSidePainting) &&
+  if (cc::IsImplSidePaintingEnabled(&browser_cmd) &&
       !browser_cmd.HasSwitch(switches::kEnableDeferredImageDecoding))
     renderer_cmd->AppendSwitch(switches::kEnableDeferredImageDecoding);
 }