<webview>: Move contentload event from content to chrome

content/common/browser_plugin/browser_plugin_messages.h

 // 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.
 
 // Multiply-included message header, no traditional include guard.
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/process.h"
@@ skipping 312 matching lines @@
 // the BrowserPluginMsg_Close message.
 IPC_MESSAGE_CONTROL1(BrowserPluginMsg_Close,
                      int /* instance_id */)
 
 // Once the swapped out guest RenderView has been created in the embedder render
 // process, the browser process informs the embedder of its routing ID.
 IPC_MESSAGE_CONTROL2(BrowserPluginMsg_GuestContentWindowReady,
                      int /* instance_id */,
                      int /* source_routing_id */)
 
-// After the load handler of the guest's main frame is called, the browser
-// process informs the embedder through the BrowserPluginMsg_LoadHandlerCalled
-// message.
-IPC_MESSAGE_CONTROL1(BrowserPluginMsg_LoadHandlerCalled,
-                     int /* instance_id */)
-
 // When the guest begins to load a page, the browser process informs the
 // embedder through the BrowserPluginMsg_LoadStart message.
 IPC_MESSAGE_CONTROL3(BrowserPluginMsg_LoadStart,
                      int /* instance_id */,
                      GURL /* url */,
                      bool /* is_top_level */)
 
 // If the guest fails to commit a page load then it will inform the
 // embedder through the BrowserPluginMsg_LoadAbort. A description
 // of the error will be stored in |type|.  The list of known error
@@ skipping 94 matching lines @@
 // request to the embeddder through this message.
 IPC_MESSAGE_CONTROL4(BrowserPluginMsg_RequestPermission,
                      int /* instance_id */,
                      BrowserPluginPermissionType /* permission_type */,
                      int /* request_id */,
                      base::DictionaryValue /* request_info */)
 
 // Forwards a PointerLock Unlock request to the BrowserPlugin.
 IPC_MESSAGE_CONTROL1(BrowserPluginMsg_UnlockMouse, int /* instance_id */)