Refactor GuestViewContainer::AttachRequest to allow for other request types

content/renderer/browser_plugin/browser_plugin_manager.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.
 
 #ifndef CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_MANAGER_H_
 #define CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_MANAGER_H_
 
 #include "base/id_map.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 33 matching lines @@
   void Attach(int browser_plugin_instance_id);
 
   void AddBrowserPlugin(int browser_plugin_instance_id,
                         BrowserPlugin* browser_plugin);
   void RemoveBrowserPlugin(int browser_plugin_instance_id);
   BrowserPlugin* GetBrowserPlugin(int browser_plugin_instance_id) const;
 
   void UpdateDeviceScaleFactor();
   void UpdateFocusState();
   RenderViewImpl* render_view() const { return render_view_.get(); }
+
+  // Returns a new instance ID to be used by BrowserPlugin. Instance IDs are
+  // unique per process.
   int GetNextInstanceID();
 
   // RenderViewObserver override. Call on render thread.
   void DidCommitCompositorFrame() override;
   bool OnMessageReceived(const IPC::Message& message) override;
   bool Send(IPC::Message* msg) override;
 
   // Don't destroy the BrowserPluginManager when the RenderViewImpl goes away.
   // BrowserPluginManager's lifetime is managed by a reference count. Once
   // the host RenderViewImpl and all BrowserPlugins release their references,
   // then the BrowserPluginManager will be destroyed.
   void OnDestruct() override {}
 
  private:
   // Friend RefCounted so that the dtor can be non-public.
   friend class base::RefCounted<BrowserPluginManager>;
 
   ~BrowserPluginManager() override;
 
   // IPC message handlers.
   void OnCompositorFrameSwappedPluginUnavailable(const IPC::Message& message);
 
   // This map is keyed by guest instance IDs.
   IDMap<BrowserPlugin> instances_;
-  int current_instance_id_;
   base::WeakPtr<RenderViewImpl> render_view_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginManager);
 };
 
 }  // namespace content
 
 #endif //  CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_MANAGER_H_