cc: Trigger GPU rasterization based on a per-layer hint

webkit/renderer/compositor_bindings/web_layer_impl.cc

Index: webkit/renderer/compositor_bindings/web_layer_impl.cc
diff --git a/webkit/renderer/compositor_bindings/web_layer_impl.cc b/webkit/renderer/compositor_bindings/web_layer_impl.cc
index 0cac5f9c69dc302985b7258e8f534b14a24438d0..c62dfddae8931c4b4ef7853a6e332bb6f242421e 100644
--- a/webkit/renderer/compositor_bindings/web_layer_impl.cc
+++ b/webkit/renderer/compositor_bindings/web_layer_impl.cc
@@ -43,7 +43,7 @@ namespace {
 
 struct ImplSidePaintingStatus {
   ImplSidePaintingStatus()
-      : enabled(cc::switches::IsImplSidePaintingEnabled()) {
+      : enabled(false) {
   }
   bool enabled;
 };
@@ -73,6 +73,11 @@ bool WebLayerImpl::UsingPictureLayer() {
   return g_impl_side_painting_status.Get().enabled;
 }
 
+// static
+void WebLayerImpl::SetImplSidePaintingEnabled(bool enabled) {
+  g_impl_side_painting_status.Get().enabled = enabled;
+}
+
 int WebLayerImpl::id() const { return layer_->id(); }
 
 void WebLayerImpl::invalidateRect(const blink::WebFloatRect& rect) {
@@ -211,6 +216,10 @@ void WebLayerImpl::setBackgroundFilters(const WebFilterOperations& filters) {
   layer_->SetBackgroundFilters(filters_impl.AsFilterOperations());
 }
 
+void WebLayerImpl::setHasGpuRasterizationHint(bool has_hint) {
+  layer_->SetHasGpuRasterizationHint(has_hint);
+}
+
 void WebLayerImpl::setAnimationDelegate(
       blink::WebAnimationDelegate* delegate) {
   animation_delegate_adapter_.reset(