Revert of Include sync.pb.h in sync_data.h.

chrome/chrome.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,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
     # the link of the actual chrome (or chromium) executable on
@@ skipping 121 matching lines @@
           'target_name': 'debugger',
           'type': 'static_library',
           'variables': { 'enable_wexit_time_destructors': 1, },
           'dependencies': [
             'chrome_resources.gyp:chrome_extra_resources',
             'chrome_resources.gyp:chrome_resources',
             'chrome_resources.gyp:chrome_strings',
             'chrome_resources.gyp:theme_resources',
             'common/extensions/api/api.gyp:chrome_api',
             '../base/base.gyp:base',
-            '../base/base.gyp:base_prefs',
             '../content/content.gyp:content_browser',
             '../net/net.gyp:http_server',
             '../net/net.gyp:net',
             '../skia/skia.gyp:skia',
             '../third_party/icu/icu.gyp:icui18n',
             '../third_party/icu/icu.gyp:icuuc',
             '../third_party/leveldatabase/leveldatabase.gyp:leveldatabase',
             '../third_party/libusb/libusb.gyp:libusb',
           ],
           'include_dirs': [
@@ skipping 961 matching lines @@
               'sources': [
                 'service/cloud_print/print_system_dummy.cc',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }