Update more includes that were pointing to the old locations.

chrome/browser/prerender/prerender_plt_recorder.h

 // Copyright (c) 2011 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_PRERENDER_PRERENDER_PLT_RECORDER_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_PLT_RECORDER_H_
 #pragma once
 
 #include <list>
 #include <vector>
 
 #include "base/scoped_ptr.h"
 #include "base/time.h"
-#include "chrome/browser/tab_contents/tab_contents_observer.h"
+#include "content/browser/tab_contents/tab_contents_observer.h"
 #include "googleurl/src/gurl.h"
 
 class PrerenderContents;
 class Profile;
 class TabContents;
 
 namespace prerender {
 
 // PrerenderPLTRecorder is responsible for recording perceived pageload times
 // to compare PLT's with prerendering enabled and disabled.
@@ skipping 16 matching lines @@
   // System time at which the current load was started for the purpose of
   // the perceived page load time (PPLT).
   base::TimeTicks pplt_load_start_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderPLTRecorder);
 };
 
 }  // prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_PLT_RECORDER_H_