Remove prerender sessionStorage namespace merging (1/2)

chrome/browser/prerender/prerender_histograms.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_PRERENDER_PRERENDER_HISTOGRAMS_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_HISTOGRAMS_H_
 
 #include <string>
 
 #include "base/time/time.h"
 #include "chrome/browser/prerender/prerender_contents.h"
-#include "chrome/browser/prerender/prerender_events.h"
 #include "chrome/browser/prerender/prerender_final_status.h"
 #include "chrome/browser/prerender/prerender_local_predictor.h"
 #include "chrome/browser/prerender/prerender_origin.h"
 #include "url/gurl.h"
 
 namespace prerender {
 
 // Navigation type for histograms.
 enum NavigationType {
   // A normal completed navigation.
@@ skipping 70 matching lines @@
   // a prerender.
   void RecordConcurrency(size_t prerender_count) const;
 
   // Called when we swap in a prerender.
   void RecordUsedPrerender(Origin origin) const;
 
   // Record the time since a page was recently visited.
   void RecordTimeSinceLastRecentVisit(Origin origin,
                                       base::TimeDelta time) const;
 
-  // Records a prerender event.
-  void RecordEvent(Origin origin, uint8 experiment_id, PrerenderEvent event)
-      const;
-
   // Record a prerender cookie status bitmap. Must be in the range
   // [0, PrerenderContents::kNumCookieStatuses).
   void RecordCookieStatus(Origin origin,
                           uint8 experiment_id,
                           int cookie_status) const;
 
   // Record a prerender cookie send type. Must be in the range
   // [0, PrerenderContents::kNumCookieSendTypes).
   void RecordCookieSendType(Origin origin,
                             uint8 experiment_id,
@@ skipping 50 matching lines @@
   // start recording events before the first prerender occurs.
   bool seen_any_pageload_;
   bool seen_pageload_started_after_prerender_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderHistograms);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_HISTOGRAMS_H_