GuestView: Move lifetime management out of content

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/process.h"
@@ skipping 107 matching lines @@
                     int /* browser_plugin_instance_id */,
                     int /* request_id */,
                     SkBitmap)
 
 // Notify the guest renderer that some resources given to the embededer
 // are not used any more.
 IPC_MESSAGE_ROUTED2(BrowserPluginHostMsg_ReclaimCompositorResources,
                     int /* browser_plugin_instance_id */,
                     FrameHostMsg_ReclaimCompositorResources_Params /* params */)
 
-// When a BrowserPlugin has been removed from the embedder's DOM, it informs
-// the browser process to cleanup the guest.
-IPC_MESSAGE_ROUTED1(BrowserPluginHostMsg_PluginDestroyed,
-                    int /* browser_plugin_instance_id */)
-
 // Tells the guest it has been shown or hidden.
 IPC_MESSAGE_ROUTED2(BrowserPluginHostMsg_SetVisibility,
                     int /* browser_plugin_instance_id */,
                     bool /* visible */)
 
 // Tells the guest that a drag event happened on the plugin.
 IPC_MESSAGE_ROUTED5(BrowserPluginHostMsg_DragStatusUpdate,
                     int /* browser_plugin_instance_id */,
                     blink::WebDragStatus /* drag_status */,
                     content::DropData /* drop_data */,
@@ skipping 71 matching lines @@
 
 // Forwards a PointerLock Unlock request to the BrowserPlugin.
 IPC_MESSAGE_CONTROL2(BrowserPluginMsg_SetMouseLock,
                      int /* browser_plugin_instance_id */,
                      bool /* enable */)
 
 // Acknowledge that we presented an ubercomp frame.
 IPC_MESSAGE_ROUTED2(BrowserPluginHostMsg_CompositorFrameSwappedACK,
                     int /* browser_plugin_instance_id */,
                     FrameHostMsg_CompositorFrameSwappedACK_Params /* params */)