Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/devtools/devtools_target_impl.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/devtools/devtools_target_impl.h"
 
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_iterator.h"
 #include "chrome/browser/ui/webui/extensions/extension_icon_source.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/favicon_status.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
+#include "extensions/browser/extension_system.h"
 
 using content::BrowserThread;
 using content::DevToolsAgentHost;
 using content::RenderViewHost;
 using content::WebContents;
 using content::WorkerService;
 
 namespace {
 
 const char kTargetTypeApp[] = "app";
@@ skipping 289 matching lines @@
 
 // static
 void DevToolsTargetImpl::EnumerateAllTargets(Callback callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   content::BrowserThread::PostTask(
       content::BrowserThread::IO,
       FROM_HERE,
       base::Bind(&DevToolsTargetImpl::EnumerateWorkerTargets,
                  base::Bind(&CollectAllTargets, callback)));
 }