events: Create a separate platforms target.

ui/aura/aura.gyp

 # Copyright (c) 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
       'target_name': 'aura',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:base_i18n',
         '../../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../../gpu/gpu.gyp:gpu',
         '../../skia/skia.gyp:skia',
         '../base/ui_base.gyp:ui_base',
         '../compositor/compositor.gyp:compositor',
         '../events/events.gyp:events',
         '../events/events.gyp:events_base',
+        '../events/platform/events_platform.gyp:events_platform',
         '../gfx/gfx.gyp:gfx',
         '../gfx/gfx.gyp:gfx_geometry',
       ],
       'defines': [
         'AURA_IMPLEMENTATION',
       ],
       'sources': [
         'client/aura_constants.cc',
         'client/aura_constants.h',
         'client/capture_client.cc',
@@ skipping 76 matching lines @@
         '../wm/public/transient_window_client.h',
         '../wm/public/window_move_client.cc',
         '../wm/public/window_move_client.h',
       ],
       'conditions': [
         ['use_x11==1', {
           'dependencies': [
             '../../build/linux/system.gyp:x11',
             '../../build/linux/system.gyp:xrandr',
             '../../build/linux/system.gyp:xi',
+            '../events/platform/x11/x11_events_platform.gyp:x11_events_platform',
           ],
         }],
         ['OS=="win"', {
           'dependencies': [
             '../metro_viewer/metro_viewer.gyp:metro_viewer_messages',
             '../../ipc/ipc.gyp:ipc',
           ],
           'sources!': [
             'input_state_lookup.cc',
           ],
@@ skipping 160 matching lines @@
         ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
            # See http://crbug.com/162998#c4 for why this is needed.
             '../../base/allocator/allocator.gyp:allocator',
           ],
         }],
       ],
     },
   ],
 }