Allow for building content_shell from within WebKit

content/content_tests.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'test_support_content',
       'type': 'static_library',
       'defines!': ['CONTENT_IMPLEMENTATION'],
       'dependencies': [
         '../build/temp_gyp/googleurl.gyp:googleurl',
         'content_browser',
         'content_common',
         '../skia/skia.gyp:skia',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../third_party/libvpx/libvpx.gyp:libvpx',
-        '../third_party/WebKit/Source/WebKit/chromium/WebKit.gyp:webkit',
+        '<(webkit_src_dir)/Source/WebKit/chromium/WebKit.gyp:webkit',
         '../ui/surface/surface.gyp:surface',
         '../ui/ui.gyp:ui_test_support',
         '../webkit/support/webkit_support.gyp:appcache',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         # TODO(phajdan.jr): All of those files should live in content/test.
         'browser/download/mock_download_file.cc',
@@ skipping 147 matching lines @@
         '../gpu/gpu.gyp:gpu_unittest_utils',
         '../ipc/ipc.gyp:test_support_ipc',
         '../jingle/jingle.gyp:jingle_glue_test_util',
         '../media/media.gyp:media_test_support',
         '../net/net.gyp:net_test_support',
         '../skia/skia.gyp:skia',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../third_party/libjingle/libjingle.gyp:libjingle',
         '../third_party/libvpx/libvpx.gyp:libvpx',
-        '../third_party/WebKit/Source/WebKit/chromium/WebKit.gyp:webkit',
+        '<(webkit_src_dir)/Source/WebKit/chromium/WebKit.gyp:webkit',
         '../ui/gl/gl.gyp:gl',
         '../ui/ui.gyp:ui',
         '../v8/tools/gyp/v8.gyp:v8',
         '../webkit/support/webkit_support.gyp:database',
         '../webkit/support/webkit_support.gyp:glue',
         '../webkit/support/webkit_support.gyp:quota',
         '../webkit/support/webkit_support.gyp:webkit_media',
       ],
       'include_dirs': [
         '..',
@@ skipping 333 matching lines @@
             '../testing/gtest.gyp:gtest',
           ],
           'sources': [
             'common/gpu/media/h264_parser_unittest.cc',
           ],
         }
       ],
     }],
   ],
 }