Cleanup webkit_child target and dependencies on it.

ui/app_list/app_list.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': [
     {
@@ skipping 247 matching lines @@
           ],
         }, {  # OS!="mac"
           'sources/': [
             ['exclude', 'cocoa/'],
           ],
         }],
         # See http://crbug.com/162998#c4 for why this is needed.
         ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
             '../../base/allocator/allocator.gyp:allocator',
-            # The following two dependencies provide the missing
-            # symbol HeapProfilerStart in Linux component builds.
-            # They probably can be removed after http://crbug.com/263316
-            '../../webkit/child/webkit_child.gyp:webkit_child',
           ],
         }],
         ['OS=="win" and win_use_allocator_shim==1', {
           'dependencies': [
             '../../base/allocator/allocator.gyp:allocator',
           ],
         }],
       ],
       # Disable c4267 warnings until we fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
@@ skipping 35 matching lines @@
               'dependencies': [
                 '../../sandbox/sandbox.gyp:sandbox',
               ],
             }],
           ],
         },
       ],
     }],  # toolkit_views==1
   ],
 }