Split GCMDriver into platform-specific implementations

chrome/browser/services/gcm/fake_gcm_profile_service.cc

 // 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.
 
 #include "chrome/browser/services/gcm/fake_gcm_profile_service.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/gcm/gcm_driver.h"
 
 namespace gcm {
 
-class FakeGCMDriver : public GCMDriver {
+// TODO(johnme): Maybe this should extend GCMDriver instead?
+class FakeGCMDriver : public GCMDriverDesktop {
  public:
   explicit FakeGCMDriver(FakeGCMProfileService* service);
   virtual ~FakeGCMDriver();
 
   // GCMProfileService overrides.
   virtual void Shutdown() OVERRIDE;
   virtual void AddAppHandler(const std::string& app_id,
                              GCMAppHandler* handler) OVERRIDE;;
   virtual void RemoveAppHandler(const std::string& app_id) OVERRIDE;;
   virtual void Register(const std::string& app_id,
@@ skipping 114 matching lines @@
   GCMClient::Result result = GCMClient::SUCCESS;
   if (!unregister_responses_.empty()) {
     result = unregister_responses_.front();
     unregister_responses_.pop_front();
   }
 
   callback.Run(result);
 }
 
 }  // namespace gcm