Revert "Record time for UI task to execute under 1/60s"

chrome/browser/metrics/first_web_contents_profiler.h

 // Copyright 2014 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_METRICS_FIRST_WEB_CONTENTS_PROFILER_H_
 #define CHROME_BROWSER_METRICS_FIRST_WEB_CONTENTS_PROFILER_H_
 
 #include "base/memory/scoped_ptr.h"
-#include "base/metrics/histogram.h"
 #include "content/public/browser/web_contents_observer.h"
 
 namespace content {
 class WebContents;
 }  // namespace content
 
 // Measures start up performance of the first active web contents.
 // This class is declared on all platforms, but only defined on non-Android
 // platforms. Android code should not call any non-trivial methods on this
 // class.
@@ skipping 47 matching lines @@
 
   // Whether this instance has finished collecting first-paint and main-frame-
   // load metrics (navigation metrics are recorded on a best effort but don't
   // prevent the FirstWebContentsProfiler from calling it).
   bool IsFinishedCollectingMetrics();
 
   // Informs the delegate that this instance has finished collecting all of its
   // metrics. Logs |finish_reason| to UMA.
   void FinishedCollectingMetrics(FinishReason finish_reason);
 
-  // Initialize histograms for unresponsiveness metrics.
-  void InitHistograms();
-
   // Whether an attempt was made to collect the "NonEmptyPaint" metric.
   bool collected_paint_metric_;
 
   // Whether an attempt was made to collect the "MainFrameLoad" metric.
   bool collected_load_metric_;
 
   // Whether an attempt was made to collect the "MainNavigationStart" metric.
   bool collected_main_navigation_start_metric_;
 
   // Whether an attempt was made to collect the "MainNavigationFinished" metric.
   bool collected_main_navigation_finished_metric_;
 
   // Whether core metric collection is complete. Used to keep reporting old
   // stats post abandon to give us an intra-milestone comparison basis initially
   // between the old and new stats. TODO(gab): Remove this in M49.
   bool finished_;
 
   // |delegate_| owns |this|.
   Delegate* delegate_;
 
-  // Histogram that keeps track of response times for the watched thread.
-  base::HistogramBase* responsiveness_histogram_;
-
-  // Histogram that keeps track of response times for the watched thread.
-  base::HistogramBase* responsiveness_1sec_histogram_;
-
-  // Histogram that keeps track of response times for the watched thread.
-  base::HistogramBase* responsiveness_10sec_histogram_;
-
-  // Histogram that keeps track of response times for the watched thread.
-  base::HistogramBase* unresponsiveness_histogram_;
-
-  // Histogram that keeps track of response times for the watched thread.
-  base::HistogramBase* unresponsiveness_1sec_histogram_;
-
-  // Histogram that keeps track of response times for the watched thread.
-  base::HistogramBase* unresponsiveness_10sec_histogram_;
-
   DISALLOW_COPY_AND_ASSIGN(FirstWebContentsProfiler);
 };
 
 #endif  // CHROME_BROWSER_METRICS_FIRST_WEB_CONTENTS_PROFILER_H_