Disable HTML5 DataGrid tag support, until the implementation's more complete....

webkit/webkit.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': {
     'feature_defines': [
       'ENABLE_CHANNEL_MESSAGING=1',
       'ENABLE_DATABASE=1',
-      'ENABLE_DATAGRID=1',
+      'ENABLE_DATAGRID=0',
       'ENABLE_DASHBOARD_SUPPORT=0',
       'ENABLE_DOM_STORAGE=1',
       'ENABLE_JAVASCRIPT_DEBUGGER=0',
       'ENABLE_JSC_MULTIPLE_THREADS=0',
       'ENABLE_ICONDATABASE=0',
       'ENABLE_XSLT=1',
       'ENABLE_XPATH=1',
       'ENABLE_SHARED_WORKERS=0',
       'ENABLE_SVG=1',
       'ENABLE_SVG_ANIMATION=1',
@@ skipping 1654 matching lines @@
             '../third_party/WebKit/WebCore/inspector/front-end/Images/userInputPreviousIcon.png',
             '../third_party/WebKit/WebCore/inspector/front-end/Images/warningIcon.png',
             '../third_party/WebKit/WebCore/inspector/front-end/Images/warningMediumIcon.png',
             '../third_party/WebKit/WebCore/inspector/front-end/Images/warningsErrors.png',
           ],
         },
       ],
     },
   ],
 }