Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/extensions/api/gcm/gcm_api.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/extensions/api/gcm/gcm_api.h"
 
 #include <algorithm>
 #include <map>
 #include <vector>
 
 #include "base/sha1.h"
 #include "base/strings/string_number_conversions.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/services/gcm/gcm_profile_service.h"
 #include "chrome/browser/services/gcm/gcm_profile_service_factory.h"
 #include "chrome/common/extensions/api/gcm.h"
 #include "extensions/browser/event_router.h"
+#include "extensions/browser/extension_system.h"
 #include "extensions/common/extension.h"
 
 namespace {
 
 const size_t kMaximumMessageSize = 4096;  // in bytes.
 const char kGoogDotRestrictedPrefix[] = "goog.";
 const size_t kGoogDotPrefixLength = arraysize(kGoogDotRestrictedPrefix) - 1;
 const char kGoogleRestrictedPrefix[] = "google";
 const size_t kGooglePrefixLength = arraysize(kGoogleRestrictedPrefix) - 1;
 
@@ skipping 181 matching lines @@
 
   scoped_ptr<Event> event(new Event(
       api::gcm::OnSendError::kEventName,
       api::gcm::OnSendError::Create(error).Pass(),
       profile_));
   ExtensionSystem::Get(profile_)->event_router()->DispatchEventToExtension(
       app_id, event.Pass());
 }
 
 }  // namespace extensions