Split web_view_internal_api and move part of it to extensions.

chrome/renderer/resources/extensions/web_view_events.js

 // Copyright 2014 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.
 
 // Event management for WebViewInternal.
 
 var DeclarativeWebRequestSchema =
     requireNative('schema_registry').GetSchema('declarativeWebRequest');
 var EventBindings = require('event_bindings');
 var IdGenerator = requireNative('id_generator');
@@ skipping 33 matching lines @@
   },
   'consolemessage': {
     evt: CreateEvent('webViewInternal.onConsoleMessage'),
     fields: ['level', 'message', 'line', 'sourceId']
   },
   'contentload': {
     evt: CreateEvent('webViewInternal.onContentLoad'),
     fields: []
   },
   'contextmenu': {
-    evt: CreateEvent('webViewInternal.contextmenu'),
+    evt: CreateEvent('chromeWebViewInternal.contextmenu'),
     cancelable: true,
     customHandler: function(handler, event, webViewEvent) {
       handler.handleContextMenu(event, webViewEvent);
     },
     fields: ['items']
   },
   'dialog': {
     cancelable: true,
     customHandler: function(handler, event, webViewEvent) {
       handler.handleDialogEvent(event, webViewEvent);
@@ skipping 534 matching lines @@
   }
 };
 
 WebViewEvents.prototype.handleSizeChangedEvent = function(
     event, webViewEvent) {
   this.webViewInternal.onSizeChanged(webViewEvent);
 };
 
 exports.WebViewEvents = WebViewEvents;
 exports.CreateEvent = CreateEvent;