Don't throw exceptions when v8 objects/contexts are missing, and catch

chrome/chrome_renderer.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': 'renderer',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 45 matching lines @@
         'renderer/extensions/binding_generating_native_handler.cc',
         'renderer/extensions/binding_generating_native_handler.h',
         'renderer/extensions/chrome_v8_context.cc',
         'renderer/extensions/chrome_v8_context.h',
         'renderer/extensions/chrome_v8_context_set.cc',
         'renderer/extensions/chrome_v8_context_set.h',
         'renderer/extensions/chrome_v8_extension.cc',
         'renderer/extensions/chrome_v8_extension.h',
         'renderer/extensions/chrome_v8_extension_handler.cc',
         'renderer/extensions/chrome_v8_extension_handler.h',
+        'renderer/extensions/console.cc',
+        'renderer/extensions/console.h',
         'renderer/extensions/content_watcher.cc',
         'renderer/extensions/content_watcher.h',
         'renderer/extensions/context_menus_custom_bindings.cc',
         'renderer/extensions/context_menus_custom_bindings.h',
         'renderer/extensions/dispatcher.cc',
         'renderer/extensions/dispatcher.h',
         'renderer/extensions/dom_activity_logger.cc',
         'renderer/extensions/dom_activity_logger.h',
         'renderer/extensions/event_bindings.cc',
         'renderer/extensions/event_bindings.h',
@@ skipping 304 matching lines @@
               'export_dependent_settings': [
                 '<(allocator_target)',
               ],
             }],
           ],
         }],
       ],
     },
   ],
 }