cc: Rename LayerTreeHost to LayerTreeHostInProcess.

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 7bf43eb47b89863e91fb22ba506e4de86678005b..0ebbb527a4c15de29fedb50b72a196525debf062 100644
--- a/cc/trees/layer_tree.h
+++ b/cc/trees/layer_tree.h
@@ -33,6 +33,8 @@ class LayerUpdate;
 }  // namespace proto
 
 class AnimationHost;
+class ClientPictureCache;
+class EnginePictureCache;
 class HeadsUpDisplayLayer;
 class Layer;
 class LayerTreeHost;
@@ -148,6 +150,19 @@ 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_; }
@@ -285,6 +300,11 @@ class CC_EXPORT LayerTree : public MutatorHostClient {
   std::unique_ptr<AnimationHost> animation_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);
 };