modify test_shell target to build everything for layout_tests, move image_diff to tools/

chrome/chrome.gyp

 # Copyright (c) 2009 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 3163 matching lines @@
           ],
           'sources!': [
             'app/chrome_exe_main.cc',
             'app/client_util.cc',
             'app/google_update_client.cc',
           ]
         }],
       ],
     },
     {
-      'target_name': 'image_diff',
-      'type': 'executable',
-      'msvs_guid': '50B079C7-CD01-42D3-B8C4-9F8D9322E822',
-      'dependencies': [
-        '../base/base.gyp:base',
-        '../base/base.gyp:base_gfx',
-      ],
-      'sources': [
-        'tools/test/image_diff/image_diff.cc',
-      ],
-    },
-    {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': '<(library)',
       'dependencies': [
         'browser',
         'common',
         'renderer',
         'chrome_resources',
         'chrome_strings',
@@ skipping 1836 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],
   ],  # 'conditions'
 }