Add ExtensionSytem::Get(Profile*) as a wrapper around

chrome/browser/extensions/extension_system.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_system.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/string_tokenizer.h"
@@ skipping 28 matching lines @@
 //
 // ExtensionSystem
 //
 
 ExtensionSystem::ExtensionSystem() {
 }
 
 ExtensionSystem::~ExtensionSystem() {
 }
 
+// static
+ExtensionSystem* ExtensionSystem::Get(Profile* profile) {
+  return ExtensionSystemFactory::GetForProfile(profile);
+}
+
 //
 // ExtensionSystemImpl::Shared
 //
 
 ExtensionSystemImpl::Shared::Shared(Profile* profile)
     : profile_(profile) {
 }
 
 ExtensionSystemImpl::Shared::~Shared() {
 }
@@ skipping 223 matching lines @@
 }
 
 void ExtensionSystemImpl::UnregisterExtensionWithRequestContexts(
     const std::string& extension_id,
     const extension_misc::UnloadedExtensionReason reason) {
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&ExtensionInfoMap::RemoveExtension, info_map(),
                  extension_id, reason));
 }