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

chrome/common/render_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.
 
 // Multiply-included file, no traditional include guard.
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 158 matching lines @@
 
 // History system notification that a link has been added and the link
 // coloring state for the given hash must be re-calculated.
 IPC_MESSAGE_CONTROL1(ViewMsg_VisitedLink_Add, std::vector<uint64>)
 
 // History system notification that one or more history items have been
 // deleted, which at this point means that all link coloring state must be
 // re-calculated.
 IPC_MESSAGE_CONTROL0(ViewMsg_VisitedLink_Reset)
 
-// Sent when user prompting is required before a ViewHostMsg_GetCookies
-// message can complete.  This message indicates that the renderer should
-// pump messages while waiting for cookies.
-IPC_MESSAGE_CONTROL0(ViewMsg_SignalCookiePromptEvent)
-
 // Set the content settings for a particular url that the renderer is in the
 // process of loading.  This will be stored, to be used if the load commits
 // and ignored otherwise.
 IPC_MESSAGE_ROUTED2(ViewMsg_SetContentSettingsForLoadingURL,
                     GURL /* url */,
                     ContentSettings /* content_settings */)
 
 // Set the content settings for a particular url, so all render views
 // displaying this host url update their content settings to match.
 IPC_MESSAGE_CONTROL2(ViewMsg_SetContentSettingsForCurrentURL,
                      GURL /* url */,
                      ContentSettings /* content_settings */)
 
 // Install the first missing pluign.
 IPC_MESSAGE_ROUTED0(ViewMsg_InstallMissingPlugin)
 
-// Tells the renderer to empty its plugin list cache, optional reloading
-// pages containing plugins.
-IPC_MESSAGE_CONTROL1(ViewMsg_PurgePluginListCache,
-                     bool /* reload_pages */)
-
 // Tells the render view to load all blocked plugins.
 IPC_MESSAGE_ROUTED0(ViewMsg_LoadBlockedPlugins)
 
 // Tells the render view a prerendered page is about to be displayed.
 IPC_MESSAGE_ROUTED0(ViewMsg_DisplayPrerenderedPage)
 
 // Used to instruct the RenderView to go into "view source" mode.
 IPC_MESSAGE_ROUTED0(ViewMsg_EnableViewSourceMode)
 
 // Get all savable resource links from current webpage, include main
@@ skipping 299 matching lines @@
 // while performing stress testing.
 IPC_MESSAGE_ROUTED2(ViewMsg_JavaScriptStressTestControl,
                     int /* cmd */,
                     int /* param */)
 
 // Register a new handler for URL requests with the given scheme.
 IPC_MESSAGE_ROUTED3(ViewHostMsg_RegisterProtocolHandler,
                     std::string /* scheme */,
                     GURL /* url */,
                     string16 /* title */)