Rewrite clipboard write IPC handling to be easier to understand.

ui/base/ui_base.gyp

 # Copyright 2014 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': [
     {
@@ skipping 16 matching lines @@
         '../gfx/gfx.gyp:gfx',
         '../gfx/gfx.gyp:gfx_geometry',
         '../resources/ui_resources.gyp:ui_resources',
         '../strings/ui_strings.gyp:ui_strings',
       ],
       'defines': [
         'UI_BASE_IMPLEMENTATION',
       ],
       'export_dependent_settings': [
         '../../net/net.gyp:net',
+        '../../skia/skia.gyp:skia',
         '../gfx/gfx.gyp:gfx',
       ],
       'sources' : [
         # Note: file list duplicated in GN build.
         'accelerators/accelerator.cc',
         'accelerators/accelerator.h',
         'accelerators/accelerator_manager.cc',
         'accelerators/accelerator_manager.h',
         'accelerators/menu_label_accelerator_util_linux.cc',
         'accelerators/menu_label_accelerator_util_linux.h',
@@ skipping 710 matching lines @@
            ],
            'variables': {
              'jni_gen_package': 'ui',
            },
            'includes': [ '../../build/jni_generator.gypi' ],
          },
        ],
     }],
   ],
 }