Move more code from headers to implementation.

chrome/common/metrics_helpers.h

 // Copyright (c) 2010 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 set of user experience metrics data recorded by
 // the MetricsService.  This is the unit of data that is sent to the server.
 
 #ifndef CHROME_COMMON_METRICS_HELPERS_H_
 #define CHROME_COMMON_METRICS_HELPERS_H_
 #pragma once
@@ skipping 167 matching lines @@
 // for transmission (such as from renderer to browser, or from browser to UMA
 // upload).  It has several pure virtual functions that are replaced in
 // derived classes to allow the exact lower level transmission mechanism,
 // or error report mechanism, to be replaced.  Since histograms can sit in
 // memory for an extended period of time, and are vulnerable to memory
 // corruption, this class also validates as much rendundancy as it can before
 // calling for the marginal change (a.k.a., delta) in a histogram to be sent
 // onward.
 class HistogramSender {
  protected:
-  HistogramSender() {}
-  virtual ~HistogramSender() {}
+  HistogramSender();
+  virtual ~HistogramSender();
 
   // Snapshot all histograms, and transmit the delta.
   // The arguments allow a derived class to select only a subset for
   // transmission, or to set a flag in each transmitted histogram.
   void TransmitAllHistograms(base::Histogram::Flags flags_to_set,
                              bool send_only_uma);
 
   // Send the histograms onward, as defined in a derived class.
   // This is only called with a delta, listing samples that have not previously
   // been transmitted.
@@ skipping 68 matching lines @@
       const base::Histogram& histogram,
       const base::Histogram::SampleSet& snapshot);
   virtual void InconsistencyDetected(int problem);
   virtual void UniqueInconsistencyDetected(int problem);
   virtual void SnapshotProblemResolved(int amount);
 
   DISALLOW_COPY_AND_ASSIGN(MetricsServiceBase);
 };
 
 #endif  // CHROME_COMMON_METRICS_HELPERS_H_