Remove some dead BrowserPlugin and OOPIF compositing code.

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 191 matching lines @@
 IPC_MESSAGE_CONTROL2(BrowserPluginMsg_SetCursor,
                      int /* browser_plugin_instance_id */,
                      content::WebCursor /* cursor */)
 
 IPC_MESSAGE_CONTROL4(BrowserPluginMsg_CopyFromCompositingSurface,
                      int /* browser_plugin_instance_id */,
                      int /* request_id */,
                      gfx::Rect  /* source_rect */,
                      gfx::Size  /* dest_size */)
 
-// Guest renders into an FBO with textures provided by the embedder.
-// BrowserPlugin shares mostly the same logic as out-of-process RenderFrames but
-// because BrowserPlugins implement custom a second level of routing logic,
-// the IPCs need to be annotated with an extra browser_plugin_instance_id. These
-// messages provide that extra id.
-IPC_MESSAGE_CONTROL2(BrowserPluginMsg_BuffersSwapped,
-                     int /* browser_plugin_instance_id */,
-                     FrameMsg_BuffersSwapped_Params /* params */)
-
 IPC_MESSAGE_CONTROL2(BrowserPluginMsg_CompositorFrameSwapped,
                      int /* browser_plugin_instance_id */,
                      FrameMsg_CompositorFrameSwapped_Params /* params */)
 
 // Forwards a PointerLock Unlock request to the BrowserPlugin.
 IPC_MESSAGE_CONTROL2(BrowserPluginMsg_SetMouseLock,
                      int /* browser_plugin_instance_id */,
                      bool /* enable */)
 
-// See comment about BrowserPluginMsg_BuffersSwapped and
-// BrowserPluginMsg_CompositorFrameSwapped for how these related
-// to the FrameHostMsg variants.
-IPC_MESSAGE_ROUTED1(BrowserPluginHostMsg_BuffersSwappedACK,
-                    FrameHostMsg_BuffersSwappedACK_Params /* params */)
-
 // Acknowledge that we presented an ubercomp frame.
 IPC_MESSAGE_ROUTED2(BrowserPluginHostMsg_CompositorFrameSwappedACK,
                     int /* browser_plugin_instance_id */,
                     FrameHostMsg_CompositorFrameSwappedACK_Params /* params */)