cc: Delete all the RendererCapabilities.

cc/trees/single_thread_proxy.h

Index: cc/trees/single_thread_proxy.h
diff --git a/cc/trees/single_thread_proxy.h b/cc/trees/single_thread_proxy.h
index 9e091ac98fd285c8bff17495b1467b5314869633..fd4888941e98ffe446c3362a572f17798ffe86c5 100644
--- a/cc/trees/single_thread_proxy.h
+++ b/cc/trees/single_thread_proxy.h
@@ -41,7 +41,6 @@ class CC_EXPORT SingleThreadProxy : public Proxy,
   void SetOutputSurface(OutputSurface* output_surface) override;
   void ReleaseOutputSurface() override;
   void SetVisible(bool visible) override;
-  const RendererCapabilities& GetRendererCapabilities() const override;
   void SetNeedsAnimate() override;
   void SetNeedsUpdateLayers() override;
   void SetNeedsCommit() override;
@@ -76,7 +75,6 @@ class CC_EXPORT SingleThreadProxy : public Proxy,
   void SendBeginMainFrameNotExpectedSoon() override;
 
   // LayerTreeHostImplClient implementation
-  void UpdateRendererCapabilitiesOnImplThread() override;
   void DidLoseOutputSurfaceOnImplThread() override;
   void CommitVSyncParameters(base::TimeTicks timebase,
                              base::TimeDelta interval) override;
@@ -136,7 +134,6 @@ class CC_EXPORT SingleThreadProxy : public Proxy,
   // Used on the Thread, but checked on main thread during
   // initialization/shutdown.
   std::unique_ptr<LayerTreeHostImpl> layer_tree_host_impl_;
-  RendererCapabilities renderer_capabilities_for_main_thread_;
 
   // Accessed from both threads.
   std::unique_ptr<BeginFrameSource> external_begin_frame_source_;