Aura: Have ui::Layer implement WebKit::WebExternalTextureLayerClient

ui/aura/bench/bench_main.cc

Index: ui/aura/bench/bench_main.cc
diff --git a/ui/aura/bench/bench_main.cc b/ui/aura/bench/bench_main.cc
index 7d416757dce1589489baa77d6873d058511eb3d5..0430901493db289cdf503829a5ee21c76ed28faa 100644
--- a/ui/aura/bench/bench_main.cc
+++ b/ui/aura/bench/bench_main.cc
@@ -91,6 +91,9 @@ class BenchCompositorObserver : public ui::CompositorObserver {
         frames_(0),
         max_frames_(max_frames) {
   }
+
+  virtual void OnCompositingDidCommit(ui::Compositor* compositor) OVERRIDE {}
+
   virtual void OnCompositingWillStart(Compositor* compositor) OVERRIDE {}
 
   virtual void OnCompositingStarted(Compositor* compositor) OVERRIDE {}
@@ -144,6 +147,10 @@ class WebGLTexture : public ui::Texture {
                          GL_RGBA, GL_UNSIGNED_BYTE, NULL);
   }
 
+  virtual WebGraphicsContext3D* HostContext3D() OVERRIDE {
+    return context_;
+  }
+
  private:
   virtual ~WebGLTexture() {
     context_->deleteTexture(texture_id());