Move ExtensionHost from src/chrome to src/extensions

extensions/extensions.gyp

 # Copyright 2013 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,
   },
   'targets': [
     {
@@ skipping 214 matching lines @@
         'browser/blacklist_state.h',
         'browser/browser_context_keyed_api_factory.h',
         'browser/browser_context_keyed_service_factories.cc',
         'browser/browser_context_keyed_service_factories.h',
         'browser/error_map.cc',
         'browser/error_map.h',
         'browser/event_listener_map.cc',
         'browser/event_listener_map.h',
         'browser/event_router.cc',
         'browser/event_router.h',
+        'browser/extension_host.cc',
+        'browser/extension_host.h',
         'browser/extension_host_delegate.h',
         'browser/extension_error.cc',
         'browser/extension_error.h',
         'browser/extension_function.cc',
         'browser/extension_function.h',
         'browser/extension_function_dispatcher.cc',
         'browser/extension_function_dispatcher.h',
         'browser/extension_function_registry.cc',
         'browser/extension_function_registry.h',
         'browser/extension_function_util.cc',
@@ skipping 107 matching lines @@
         'common/test_util.cc',
         'common/test_util.h',
         'common/value_builder.cc',
         'common/value_builder.h',
       ],
       # Disable c4267 warnings until we fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ]
 }