cc: Remove all blimp code from cc.

cc/trees/layer_tree.h

Index: cc/trees/layer_tree.h
diff --git a/cc/trees/layer_tree.h b/cc/trees/layer_tree.h
index 09ecc0c746be34667d5a4f4c2084a440008c9ac2..ed389bcd52b24a2cce24d3c6c586a9dd1604915a 100644
--- a/cc/trees/layer_tree.h
+++ b/cc/trees/layer_tree.h
@@ -27,13 +27,6 @@ class TimeDelta;
 }  // namespace base
 
 namespace cc {
-
-namespace proto {
-class LayerTree;
-}  // namespace proto
-
-class ClientPictureCache;
-class EnginePictureCache;
 class HeadsUpDisplayLayer;
 class Layer;
 class LayerTreeHost;
@@ -162,19 +155,6 @@ class CC_EXPORT LayerTree : public MutatorHostClient {
     return needs_meta_info_recomputation_;
   }
 
-  void set_engine_picture_cache(EnginePictureCache* cache) {
-    engine_picture_cache_ = cache;
-  }
-  EnginePictureCache* engine_picture_cache() const {
-    return engine_picture_cache_;
-  }
-  void set_client_picture_cache(ClientPictureCache* cache) {
-    client_picture_cache_ = cache;
-  }
-  ClientPictureCache* client_picture_cache() const {
-    return client_picture_cache_;
-  }
-
   void SetPageScaleFromImplSide(float page_scale);
   void SetElasticOverscrollFromImplSide(gfx::Vector2dF elastic_overscroll);
   gfx::Vector2dF elastic_overscroll() const { return elastic_overscroll_; }
@@ -190,8 +170,6 @@ class CC_EXPORT LayerTree : public MutatorHostClient {
   void PushPropertiesTo(LayerTreeImpl* tree_impl,
                         float unapplied_page_scale_delta);
 
-  void ToProtobuf(proto::LayerTree* proto);
-
   MutatorHost* mutator_host() const { return mutator_host_; }
 
   Layer* LayerByElementId(ElementId element_id) const;
@@ -305,11 +283,6 @@ class CC_EXPORT LayerTree : public MutatorHostClient {
   MutatorHost* mutator_host_;
   LayerTreeHost* layer_tree_host_;
 
-  // TODO(khushalsagar): Make these go away once we transition blimp to an
-  // external embedder.
-  EnginePictureCache* engine_picture_cache_;
-  ClientPictureCache* client_picture_cache_;
-
   DISALLOW_COPY_AND_ASSIGN(LayerTree);
 };