Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/extensions/devtools_util.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/devtools_util.h"
 
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/extensions/extension_host.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/profiles/profile.h"
+#include "extensions/browser/extension_system.h"
 #include "extensions/browser/lazy_background_task_queue.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/common/extension.h"
 
 namespace extensions {
 namespace devtools_util {
 
 namespace {
 
 // Helper to inspect an ExtensionHost after it has been loaded.
@@ skipping 14 matching lines @@
   } else {
     system->lazy_background_task_queue()->AddPendingTask(
         profile,
         extension->id(),
         base::Bind(&InspectExtensionHost));
   }
 }
 
 }  // namespace devtools_util
 }  // namespace extensions