compositor-worker: cc->blink mutation plumbing

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index ddd60cb9e6f1a7dace2cb3c442c7f8a78ed5de40..32bd4c3c45e19a7fcf353b0a86ef5efa03e51d5f 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -1000,6 +1000,12 @@ void RenderWidget::ApplyViewportDeltas(
                                   top_controls_delta);
 }
 
+void RenderWidget::ApplyMutations(const cc::LayerTreeMutations& mutations) {
+  TRACE_EVENT0("compositor-worker", "RenderWidget::ApplyMutations");

[Ian Vollick, 2016/01/22 21:56:53]

Please use TRACE_DISABLED_BY_DEFAULT (eg,
https://code.google.com/p/chromium/codesearch#chromium/src/v8/src/log-inl.h&q...).
Here and elsewhere.

[majidvp, 2016/01/22 23:32:06]

Done.

+  webwidget_->applyMutations(
+      static_cast<const blink::WebCompositorMutations&>(mutations));
+}
+
 void RenderWidget::BeginMainFrame(double frame_time_sec) {
   webwidget_->beginFrame(frame_time_sec);
 }