Add CompositingReasons to compositor layers.

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 6c2e65fc1c146db8db17c8a9199c131339cacf22..d3b67491efe9cff76f5f41fab932ad83c2a6993d 100644
--- a/webkit/renderer/compositor_bindings/web_layer_impl.cc
+++ b/webkit/renderer/compositor_bindings/web_layer_impl.cc
@@ -9,6 +9,7 @@
 #include "cc/base/region.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/layer_position_constraint.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebCompositingReasons.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebFloatPoint.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebFloatRect.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebLayerPositionConstraint.h"
@@ -170,6 +171,11 @@ void WebLayerImpl::setDebugName(WebKit::WebString name) {
       UTF16ToASCII(base::string16(name.data(), name.length())));
 }
 
+void WebLayerImpl::setCompositingReasons(
+    WebKit::WebCompositingReasons reasons) {
+  layer_->SetCompositingReasons(reasons);
+}
+
 void WebLayerImpl::setAnimationDelegate(
       WebKit::WebAnimationDelegate* delegate) {
   layer_->set_layer_animation_delegate(delegate);