cc: Replace some instances of unordered_map with base::flat_map.

cc/output/direct_renderer.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_OUTPUT_DIRECT_RENDERER_H_
 #define CC_OUTPUT_DIRECT_RENDERER_H_
 
 #include <memory>
-#include <unordered_map>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/containers/flat_map.h"
 #include "base/macros.h"
 #include "cc/base/filter_operations.h"
 #include "cc/cc_export.h"
 #include "cc/output/ca_layer_overlay.h"
 #include "cc/output/dc_layer_overlay.h"
 #include "cc/output/overlay_processor.h"
@@ skipping 232 matching lines @@
   gfx::ColorSpace reshape_device_color_space_;
   bool reshape_has_alpha_ = false;
   bool reshape_use_stencil_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_DIRECT_RENDERER_H_