switch to using native JSON object

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_DASHBOARD_SUPPORT=0',
@@ skipping 4655 matching lines @@
             'glue/devtools/js/base.js',
             'glue/devtools/js/debugger_agent.js',
             'glue/devtools/js/devtools.html',
             'glue/devtools/js/devtools.js',
             'glue/devtools/js/devtools_callback.js',
             'glue/devtools/js/devtools_host_stub.js',
             'glue/devtools/js/dom_agent.js',
             'glue/devtools/js/inject.js',
             'glue/devtools/js/inspector_controller.js',
             'glue/devtools/js/inspector_controller_impl.js',
-            'glue/devtools/js/json.js',
             'glue/devtools/js/profiler_processor.js',
             'inspector/debugger.css',
             'inspector/debugger.html',
             'inspector/DebuggerConsole.js',
             'inspector/DebuggerIPC.js',
             'inspector/DebuggerPanel.js',
             'inspector/DebuggerShell.js',
             '../third_party/WebKit/WebCore/inspector/front-end/Breakpoint.js',
             '../third_party/WebKit/WebCore/inspector/front-end/BreakpointsSidebarPane.js',
             '../third_party/WebKit/WebCore/inspector/front-end/CallStackSidebarPane.js',
@@ skipping 159 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',
           ],
         },
       ],
     },
   ],
 }