Remove unused memory usage collection in MetricsService

chrome/browser/metrics/metrics_service.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.
 
 // This file defines a service that collects information about the user
 // experience in order to help improve future versions of the app.
 
 #ifndef CHROME_BROWSER_METRICS_METRICS_SERVICE_H_
 #define CHROME_BROWSER_METRICS_METRICS_SERVICE_H_
 #pragma once
@@ skipping 212 matching lines @@
   // Save the pending_log_text_ persistently in a pref for transmission when we
   // next run.  Note that IF this text is "too large," we just dicard it.
   void PushPendingLogTextToUnsentOngoingLogs();
 
   // Start timer for next log transmission.
   void StartLogTransmissionTimer();
 
   // Internal function to collect process memory information.
   void LogTransmissionTimerDone();
 
-  // Do not call OnMemoryDetailCollectionDone() or
-  // OnHistogramSynchronizationDone() directly.
+  // Do not call OnHistogramSynchronizationDone() directly.
   // Use StartLogTransmissionTimer() to schedule a call.
-  void OnMemoryDetailCollectionDone();
   void OnHistogramSynchronizationDone();
 
   // Takes whatever log should be uploaded next (according to the state_)
   // and makes it the pending log.  If pending_log_ is not NULL,
   // MakePendingLog does nothing and returns.
   void MakePendingLog();
 
   // Determines from state_ and permissions set out by the server and by
   // the user whether the pending_log_ should be sent or discarded.  Called by
   // TryToStartTransmission.
@@ skipping 251 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, CorruptSizeOfLogList);
   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, CorruptChecksumOfLogList);
   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, ClientIdGeneratesAllZeroes);
   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, ClientIdGeneratesCorrectly);
   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, ClientIdCorrectlyFormatted);
 
   DISALLOW_COPY_AND_ASSIGN(MetricsService);
 };
 
 #endif  // CHROME_BROWSER_METRICS_METRICS_SERVICE_H_