Modify Pepper CreateResourceHostFromHost to create multiple hosts.

content/renderer/pepper/pepper_browser_connection.h

 // Copyright 2013 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.
 
 #ifndef CONTENT_RENDERER_PEPPER_PEPPER_BROWSER_CONNECTION_H_
 #define CONTENT_RENDERER_PEPPER_PEPPER_BROWSER_CONNECTION_H_
 
 #include <map>
 #include <string>
+#include <vector>
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "content/public/renderer/render_view_observer_tracker.h"
 #include "ppapi/c/pp_file_info.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_resource.h"
 
 namespace content {
 
 // This class represents a connection from the renderer to the browser for
 // sending/receiving pepper ResourceHost related messages. When the browser
 // and renderer communicate about ResourceHosts, they should pass the plugin
 // process ID to identify which plugin they are talking about.
 class PepperBrowserConnection
     : public RenderViewObserver,
       public RenderViewObserverTracker<PepperBrowserConnection> {
  public:
-  typedef base::Callback<void(int)> PendingResourceIDCallback;
+  typedef base::Callback<void(const std::vector<int>&)>
+      PendingResourceIDCallback;
   typedef base::Callback<void(
       const std::vector<PP_Resource>&,
       const std::vector<PP_FileSystemType>&,
       const std::vector<std::string>&,
       const std::vector<base::FilePath>&)> FileRefGetInfoCallback;
 
   explicit PepperBrowserConnection(RenderView* render_view);
   virtual ~PepperBrowserConnection();
 
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // TODO(teravest): Instead of having separate methods per message, we should
   // add generic functionality similar to PluginResource::Call().
 
-  // Sends a request to the browser to create a ResourceHost for the given
+  // Sends a request to the browser to create ResourceHosts for the given
   // |instance| of a plugin identified by |child_process_id|. |callback| will be
-  // run when a reply is received with the pending resource ID.
+  // run when a reply is received with the pending resource IDs.
   void SendBrowserCreate(PP_Instance instance,
                          int child_process_id,
-                         const IPC::Message& create_message,
+                         const std::vector<IPC::Message>& create_messages,
                          const PendingResourceIDCallback& callback);
 
   // Sends a request to the browser to get information about the given FileRef
   // |resource|. |callback| will be run when a reply is received with the
   // file information.
   void SendBrowserFileRefGetInfo(int child_process_id,
                                  const std::vector<PP_Resource>& resource,
                                  const FileRefGetInfoCallback& callback);
 
   // Called when the renderer creates an in-process instance.
   void DidCreateInProcessInstance(PP_Instance instance,
                                   int render_view_id,
                                   const GURL& document_url,
                                   const GURL& plugin_url);
 
   // Called when the renderer deletes an in-process instance.
   void DidDeleteInProcessInstance(PP_Instance instance);
 
  private:
   // Message handlers.
-  void OnMsgCreateResourceHostFromHostReply(int32_t sequence_number,
-                                            int pending_resource_host_id);
+  void OnMsgCreateResourceHostsFromHostReply(
+      int32_t sequence_number,
+      const std::vector<int>& pending_resource_host_ids);
   void OnMsgFileRefGetInfoReply(
       int32_t sequence_number,
       const std::vector<PP_Resource>& resources,
       const std::vector<PP_FileSystemType>& types,
       const std::vector<std::string>& file_system_url_specs,
       const std::vector<base::FilePath>& external_paths);
 
   // Return the next sequence number.
   int32_t GetNextSequence();
 
   // Sequence number to track pending callbacks.
   int32_t next_sequence_number_;
 
   // Maps a sequence number to the callback to be run.
   std::map<int32_t, PendingResourceIDCallback> pending_create_map_;
   std::map<int32_t, FileRefGetInfoCallback> get_info_map_;
   DISALLOW_COPY_AND_ASSIGN(PepperBrowserConnection);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_BROWSER_CONNECTION_H_