Reland: cc: Fix size_t to int truncations in layers/ output/ playback/ quads/

cc/layers/delegated_renderer_layer_impl.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_LAYERS_DELEGATED_RENDERER_LAYER_IMPL_H_
 #define CC_LAYERS_DELEGATED_RENDERER_LAYER_IMPL_H_
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
@@ skipping 69 matching lines @@
   void AppendRenderPassQuads(RenderPass* render_pass,
                              const RenderPass* delegated_render_pass,
                              const gfx::Size& frame_size) const;
 
   // LayerImpl overrides.
   const char* LayerTypeAsString() const override;
 
   bool have_render_passes_to_push_;
   float inverse_device_scale_factor_;
   RenderPassList render_passes_in_draw_order_;
-  base::hash_map<RenderPassId, int> render_passes_index_by_id_;
+
+  using RenderPassToIndexMap = base::hash_map<RenderPassId, size_t>;
+  RenderPassToIndexMap render_passes_index_by_id_;
   ResourceProvider::ResourceIdSet resources_;
 
   int child_id_;
   bool own_child_id_;
 
   DISALLOW_COPY_AND_ASSIGN(DelegatedRendererLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_DELEGATED_RENDERER_LAYER_IMPL_H_