Move keyboard related files from core/ to platform.

Source/core/core.gyp

 #
 # Copyright (C) 2009 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 626 matching lines @@
         }, { # OS!="linux" and OS!="android"
           'sources/': [
             ['exclude', 'Harfbuzz[^/]+\\.(cpp|h)$'],
           ],
         }],
         ['OS!="linux"', {
           'sources/': [
             ['exclude', 'Linux\\.cpp$'],
           ],
         }],
-        ['toolkit_uses_gtk == 0', {
-          'sources/': [
-            ['exclude', 'platform/chromium/KeyCodeConversionGtk\\.cpp$'],
-          ],
-        }],
         ['OS=="mac"', {
           'dependencies': [
             '<(DEPTH)/third_party/harfbuzz-ng/harfbuzz.gyp:harfbuzz-ng',
           ],
           'sources': [
             'editing/SmartReplaceCF.cpp',
           ],
           'link_settings': {
             'libraries': [
               '$(SDKROOT)/System/Library/Frameworks/Carbon.framework',
@@ skipping 434 matching lines @@
         '<(SHARED_INTERMEDIATE_DIR)/blink/bindings/V8LayerRect.h',
         '<(SHARED_INTERMEDIATE_DIR)/blink/bindings/V8LayerRectList.cpp',
         '<(SHARED_INTERMEDIATE_DIR)/blink/bindings/V8LayerRectList.h',
       ],
       'sources/': [
         ['exclude', 'testing/js'],
       ],
     },
   ],  # targets
 }