Move WindowImpl to gfx so I can use it there for canvas unit tests....

app/app_base.gypi

 # Copyright (c) 2010 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.
 
 {
   'target_defaults': {
     'variables': {
       'app_base_target': 0,
     },
     'target_conditions': [
@@ skipping 10 matching lines @@
             'hi_res_timer_manager_posix.cc',
             'hi_res_timer_manager_win.cc',
             'hi_res_timer_manager.h',
             'system_monitor.cc',
             'system_monitor.h',
             'system_monitor_posix.cc',
             'system_monitor_win.cc',
             'tree_model.h',
             'tree_node_iterator.h',
             'tree_node_model.h',
-            'win/window_impl.cc',
-            'win/window_impl.h',
         ],
         'include_dirs': [
           '..',
           '<(DEPTH)/third_party/wtl/include',
         ],
         'conditions': [
           ['OS=="win"', {
             'sources': [
               'win_util.cc',
               'win_util.h',
@@ skipping 247 matching lines @@
         ['OS!="win"', {
           'sources!': [
             'drag_drop_types.h',
             'gfx/gdi_util.cc',
             'gfx/gdi_util.h',
             'gfx/icon_util.cc',
             'gfx/icon_util.h',
             'gfx/native_theme_win.cc',
             'gfx/native_theme_win.h',
             'os_exchange_data.cc',
-            'win/window_impl.cc',
-            'win/window_impl.h',
           ],
         }],
         ['OS=="linux"', {
           'sources': [
             'gfx/gl/gl_context_egl.cc',
             'gfx/gl/gl_context_egl.h',
             '<(gl_binding_output_dir)/gl_bindings_autogen_egl.cc',
             '<(gl_binding_output_dir)/gl_bindings_autogen_egl.h',
             '<(gl_binding_output_dir)/gl_bindings_autogen_glx.cc',
             '<(gl_binding_output_dir)/gl_bindings_autogen_glx.h',
@@ skipping 82 matching lines @@
           'configurations': {
             'Common_Base': {
               'msvs_target_platform': 'x64',
             },
           },
         },
       ],
     }],
   ],
 }