Getting rid of more webview memory leaks.

components/guest_view/common/guest_view_messages.h

 // Copyright 2015 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.
 
 // IPC messages for GuestViews.
 // Multiply-included message file, hence no include guard.
 
 #include "base/values.h"
 #include "ipc/ipc_message_macros.h"
 
@@ skipping 17 matching lines @@
 // Messages sent from the renderer to the browser.
 
 // Sent by the renderer to set initialization parameters of a Browser Plugin
 // that is identified by |element_instance_id|.
 IPC_MESSAGE_CONTROL3(GuestViewHostMsg_AttachGuest,
                      int /* element_instance_id */,
                      int /* guest_instance_id */,
                      base::DictionaryValue /* attach_params */)
 
 // Sent by the renderer when a GuestView (identified by |view_instance_id|) has
+// been created in JavaScript.
+IPC_MESSAGE_CONTROL2(GuestViewHostMsg_ViewCreated,
+                     int /* view_instance_id */,
+                     std::string /* view_type */)
+
+// Sent by the renderer when a GuestView (identified by |view_instance_id|) has
 // been garbage collected in JavaScript.
 IPC_MESSAGE_CONTROL1(GuestViewHostMsg_ViewGarbageCollected,
                      int /* view_instance_id */)