Clear RenderThread of any Chrome specific code, and move a bunch of stuff out of RenderView.

content/common/view_messages.h

 // Copyright (c) 2011 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 page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "content/common/common_param_traits.h"
@@ skipping 1136 matching lines @@
 // Tells the render view that a ViewHostMsg_AccessibilityNotifications
 // message was processed and it can send addition notifications.
 IPC_MESSAGE_ROUTED0(ViewMsg_AccessibilityNotifications_ACK)
 
 // Reply to ViewHostMsg_OpenChannelToPpapiBroker
 // Tells the renderer that the channel to the broker has been created.
 IPC_MESSAGE_ROUTED2(ViewMsg_PpapiBrokerChannelCreated,
                     int /* request_id */,
                     IPC::ChannelHandle /* handle */)
 
+// Tells the renderer to empty its plugin list cache, optional reloading
+// pages containing plugins.
+IPC_MESSAGE_CONTROL1(ViewMsg_PurgePluginListCache,
+                     bool /* reload_pages */)
+
+
 // Messages sent from the renderer to the browser.
 
 // Sent by the renderer when it is creating a new window.  The browser creates
 // a tab for it and responds with a ViewMsg_CreatingNew_ACK.  If route_id is
 // MSG_ROUTING_NONE, the view couldn't be created.
 IPC_SYNC_MESSAGE_CONTROL1_2(ViewHostMsg_CreateWindow,
                             ViewHostMsg_CreateWindow_Params,
                             int /* route_id */,
                             int64 /* cloned_session_storage_namespace_id */)
 
@@ skipping 726 matching lines @@
 // enable or disable spdy.  Used for debugging/testing/benchmarking.
 IPC_MESSAGE_CONTROL1(ViewHostMsg_EnableSpdy,
                      bool /* enable */)
 
 // Message sent from the renderer to the browser to request that the browser
 // cache |data| associated with |url|.
 IPC_MESSAGE_CONTROL3(ViewHostMsg_DidGenerateCacheableMetadata,
                      GURL /* url */,
                      double /* expected_response_time */,
                      std::vector<char> /* data */)