Move implementation of BrowserList onto an inner, instantiatable class, BrowserListImpl.

chrome/browser/page_cycler/page_cycler.h

 // 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.
 
 #ifndef CHROME_BROWSER_PAGE_CYCLER_PAGE_CYCLER_H_
 #define CHROME_BROWSER_PAGE_CYCLER_PAGE_CYCLER_H_
 #pragma once
 
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
-#include "chrome/browser/ui/browser.h"
-#include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/browser_list_observer.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/web_contents_observer.h"
 
+class Browser;
+
 namespace content {
 class RenderViewHost;
 }  // namespace content
 
 namespace base {
 class TimeTicks;
 }  // namespace base
 
 // Performance test to track the resources used and speed with which chromium
 // fully loads a given set of URLs.  This class is created on the UI thread and
 // does most of its work there. However, some work happens on background threads
 // too; those are named with 'OnBackgroundThread'.
 class PageCycler : public base::RefCountedThreadSafe<PageCycler>,
-                   public BrowserList::Observer,
+                   public chrome::BrowserListObserver,
                    public content::WebContentsObserver {
  public:
   PageCycler(Browser* browser, const FilePath& urls_file);
 
   // Begin running the page cycler.
   void Run();
 
   // content::WebContentsObserver
   virtual void DidFinishLoad(int64 frame_id,
                              const GURL& validated_url,
@@ skipping 55 matching lines @@
   void WriteResultsOnBackgroundThread(const std::string& output);
 
   // Perform any necessary cleanup and exit |browser_|; virtual since tests may
   // need to override this function.
   virtual void Finish();
 
   // Called when the Browser to which |browser_| points is closed; exits
   // PageCycler.
   void Abort();
 
-  // BrowserList::Observer
+  // chrome::BrowserListObserver
   virtual void OnBrowserAdded(Browser* browser) OVERRIDE;
   virtual void OnBrowserRemoved(Browser* browser) OVERRIDE;
 
   // The Browser context in which the page cycler is running.
   Browser* browser_;
 
   // The path to the file containing the list of urls to visit.
   FilePath urls_file_;
 
   // The path to the file to which we write any errors encountered.
@@ skipping 25 matching lines @@
 
   // Indicates the abort status of the page cycler; true means aborted.
   bool aborted_;
 
   string16 error_;
 
   DISALLOW_COPY_AND_ASSIGN(PageCycler);
 };
 
 #endif  // CHROME_BROWSER_PAGE_CYCLER_PAGE_CYCLER_H_