Add initial implementation of cc::Surfaces backend for exo.

components/exo/shell_surface.h

 // Copyright 2015 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 COMPONENTS_EXO_SHELL_SURFACE_H_
 #define COMPONENTS_EXO_SHELL_SURFACE_H_
 
 #include <deque>
 #include <memory>
 #include <string>
@@ skipping 221 matching lines @@
   std::string application_id_;
   gfx::Rect geometry_;
   gfx::Rect pending_geometry_;
   double scale_;
   double pending_scale_;
   base::Closure close_callback_;
   base::Closure surface_destroyed_callback_;
   ConfigureCallback configure_callback_;
   ScopedConfigure* scoped_configure_;
   bool ignore_window_bounds_changes_;
+  gfx::Rect current_bounds_;
   gfx::Point origin_;
   gfx::Vector2d pending_origin_offset_;
   gfx::Vector2d pending_origin_config_offset_;
   int resize_component_;  // HT constant (see ui/base/hit_test.h)
   int pending_resize_component_;
   std::deque<Config> pending_configs_;
   std::unique_ptr<ash::WindowResizer> resizer_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellSurface);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_SHELL_SURFACE_H_