Even more virtual method deinlining.

chrome/common/metrics_helpers.cc

 // 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.
 
 #include "chrome/common/metrics_helpers.h"
 
 #if defined(USE_SYSTEM_LIBBZ2)
 #include <bzlib.h>
 #else
 #include "third_party/bzip2/bzlib.h"
@@ skipping 359 matching lines @@
   if (!integral_build_time) {
     Time time;
     const char* kDateTime = __DATE__ " " __TIME__ " GMT";
     bool result = Time::FromString(ASCIIToWide(kDateTime).c_str(), &time);
     DCHECK(result);
     integral_build_time = static_cast<int64>(time.ToTimeT());
   }
   return integral_build_time;
 }
 
+MetricsLog* MetricsLogBase::AsMetricsLog() {
+  return NULL;
+}
+
 // TODO(JAR): A The following should really be part of the histogram class.
 // Internal state is being needlessly exposed, and it would be hard to reuse
 // this code. If we moved this into the Histogram class, then we could use
 // the same infrastructure for logging StatsCounters, RatesCounters, etc.
 void MetricsLogBase::RecordHistogramDelta(
     const Histogram& histogram,
     const Histogram::SampleSet& snapshot) {
   DCHECK(!locked_);
   DCHECK_NE(0, snapshot.TotalCount());
   snapshot.CheckSize(histogram);
@@ skipping 176 matching lines @@
     snapshot.Subtract(*already_logged);
   }
 
   // Snapshot now contains only a delta to what we've already_logged.
   if (snapshot.redundant_count() > 0) {
     TransmitHistogramDelta(histogram, snapshot);
     // Add new data into our running total.
     already_logged->Add(snapshot);
   }
 }