keyboard: Add compositor as a dependency to fix win-aura-dbg build.

ui/keyboard/keyboard.gyp

 # Copyright (c) 2013 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
       'target_name': 'keyboard',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../skia/skia.gyp:skia',
         '../aura/aura.gyp:aura',
+        '../compositor/compositor.gyp:compositor',
         '../ui.gyp:ui',
       ],
       'defines': [
         'KEYBOARD_IMPLEMENTATION',
       ],
       'sources': [
         'keyboard_controller.cc',
         'keyboard_controller.h',
         'keyboard_controller_proxy.h',
         'keyboard_export.h',
@@ skipping 17 matching lines @@
         '../ui.gyp:run_ui_unittests',
         '../ui.gyp:ui',
         'keyboard',
       ],
       'sources': [
         'keyboard_controller_unittest.cc',
       ],
     },
   ],
 }