GuestViews should be able to specify task manager entries

extensions/browser/guest_view/guest_view_base.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_
 
 #include <queue>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 127 matching lines @@
   // This gives the derived class an opportunity to perform some cleanup prior
   // to destruction.
   virtual void WillDestroy() {}
 
   // This method is to be implemented by the derived class. Access to guest
   // views are determined by the availability of the internal extension API
   // used to implement the guest view.
   //
   // This should be the name of the API as it appears in the _api_features.json
   // file.
-  virtual const char* GetAPINamespace() = 0;
+  virtual const char* GetAPINamespace() const = 0;
+
+  // This method is to be implemented by the derived class. This method is the
+  // task prefix to show for a task produced by this GuestViewBase's derived
+  // type.
+  virtual int GetTaskPrefix() const = 0;
 
   // This method is to be implemented by the derived class. Given a set of
   // initialization parameters, a concrete subclass of GuestViewBase can
   // create a specialized WebContents that it returns back to GuestViewBase.
   typedef base::Callback<void(content::WebContents*)>
       WebContentsCreatedCallback;
   virtual void CreateWebContents(
       const std::string& embedder_extension_id,
       int embedder_render_process_id,
       const base::DictionaryValue& create_params,
@@ skipping 168 matching lines @@
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.
   base::WeakPtrFactory<GuestViewBase> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GuestViewBase);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_