Add flag to disable impl-side painting

webkit/compositor_bindings/web_layer_tree_view_impl.cc

Index: webkit/compositor_bindings/web_layer_tree_view_impl.cc
diff --git a/webkit/compositor_bindings/web_layer_tree_view_impl.cc b/webkit/compositor_bindings/web_layer_tree_view_impl.cc
index f8e8d54ded61dfbd165686219a45d78347710f25..d7d47bfb5ae942ea547285ea7845e89c5a699e1c 100644
--- a/webkit/compositor_bindings/web_layer_tree_view_impl.cc
+++ b/webkit/compositor_bindings/web_layer_tree_view_impl.cc
@@ -12,6 +12,7 @@
 #include "cc/layer_tree_host.h"
 #include "cc/switches.h"
 #include "cc/thread.h"
+#include "cc/util.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebInputHandler.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebLayer.h"
@@ -52,7 +53,7 @@ bool WebLayerTreeViewImpl::initialize(const WebLayerTreeView::Settings& webSetti
     settings.initialDebugState.showPaintRects = webSettings.showPaintRects;
     settings.initialDebugState.showPlatformLayerTree = webSettings.showPlatformLayerTree;
     settings.initialDebugState.showDebugBorders = webSettings.showDebugBorders;
-    settings.implSidePainting = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kEnableImplSidePainting);
+    settings.implSidePainting = cc::IsImplSidePaintingEnabled(CommandLine::ForCurrentProcess());
     settings.recordRenderingStats = webSettings.recordRenderingStats;
     settings.useCheapnessEstimator = CommandLine::ForCurrentProcess()->HasSwitch(switches::kUseCheapnessEstimator);