Move allocate instance id to chrome/.

content/browser/browser_plugin/browser_plugin_embedder.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.
 
 // A BrowserPluginEmbedder handles messages coming from a BrowserPlugin's
 // embedder that are not directed at any particular existing guest process.
 // In the beginning, when a BrowserPlugin instance in the embedder renderer
 // process requests an initial navigation, the WebContents for that renderer
 // renderer creates a BrowserPluginEmbedder for itself. The
 // BrowserPluginEmbedder, in turn, forwards the requests to a
@@ skipping 70 matching lines @@
 
   // Called by the content embedder when a guest exists with the provided
   // |instance_id|.
   void OnGuestCallback(int instance_id,
                        const BrowserPluginHostMsg_Attach_Params& params,
                        const base::DictionaryValue* extra_params,
                        WebContents* guest_web_contents);
 
   // Message handlers.
 
-  void OnAllocateInstanceID(int request_id);
   void OnAttach(int instance_id,
                 const BrowserPluginHostMsg_Attach_Params& params,
                 const base::DictionaryValue& extra_params);
   void OnPluginAtPositionResponse(int instance_id,
                                   int request_id,
                                   const gfx::Point& position);
 
   // Used to correctly update the cursor when dragging over a guest, and to
   // handle a race condition when dropping onto the guest that started the drag
   // (the race is that the dragend message arrives before the drop message so
   // the drop never takes place).
   // crbug.com/233571
   base::WeakPtr<BrowserPluginGuest> guest_dragging_over_;
 
   // Pointer to the guest that started the drag, used to forward necessary drag
   // status messages to the correct guest.
   base::WeakPtr<BrowserPluginGuest> guest_started_drag_;
 
   base::WeakPtrFactory<BrowserPluginEmbedder> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_