cc: Block commit on activate by setting a flag on LayerTreeHost.

cc/layers/texture_layer.h

Index: cc/layers/texture_layer.h
diff --git a/cc/layers/texture_layer.h b/cc/layers/texture_layer.h
index f8c1c6ac1a21c4f41552566a8d39ec2a9a085da2..cb34cf5f6e92bcc4337a7a68d483db1a0a37ab69 100644
--- a/cc/layers/texture_layer.h
+++ b/cc/layers/texture_layer.h
@@ -120,6 +120,7 @@ class CC_EXPORT TextureLayer : public Layer {
   void SetRateLimitContext(bool rate_limit);
 
   // Code path for plugins which supply their own texture ID.
+  // DEPRECATED. DO NOT USE.
   void SetTextureId(unsigned texture_id);
 
   // Code path for plugins which supply their own mailbox.
@@ -136,7 +137,6 @@ class CC_EXPORT TextureLayer : public Layer {
                       const OcclusionTracker* occlusion) OVERRIDE;
   virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
   virtual Region VisibleContentOpaqueRegion() const OVERRIDE;
-  virtual bool BlocksPendingCommit() const OVERRIDE;
 
   virtual bool CanClipSelf() const OVERRIDE;