Move memory histograms generation to MetricsMemoryDetails.

chrome/browser/memory_details_mac.cc

 // 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.
 
 #include "chrome/browser/memory_details.h"
 
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 30 matching lines @@
   // TODO(viettrungluu): possibly add more?
   CHROME_BROWSER = 0,
   SAFARI_BROWSER,
   FIREFOX_BROWSER,
   CAMINO_BROWSER,
   OPERA_BROWSER,
   OMNIWEB_BROWSER,
   MAX_BROWSERS
 } BrowserProcess;
 
-
-MemoryDetails::MemoryDetails()
-    : user_metrics_mode_(UPDATE_USER_METRICS),
-      memory_growth_tracker_(NULL) {
+MemoryDetails::MemoryDetails() {
   const base::FilePath browser_process_path =
       base::GetProcessExecutablePath(base::GetCurrentProcessHandle());
   const std::string browser_process_name =
       browser_process_path.BaseName().value();
   const std::string google_browser_name =
       l10n_util::GetStringUTF8(IDS_PRODUCT_NAME);
 
   // (Human and process) names of browsers; should match the ordering for
   // |BrowserProcess| (i.e., |BrowserType|).
   // TODO(viettrungluu): The current setup means that we can't detect both
@@ skipping 170 matching lines @@
   if (info.working_set.priv == 0) {
     scoped_ptr<base::ProcessMetrics> metrics;
     metrics.reset(base::ProcessMetrics::CreateProcessMetrics(
         pid, content::BrowserChildProcessHost::GetPortProvider()));
     metrics->GetWorkingSetKBytes(&info.working_set);
   }
 
   // Add the process info to our list.
   process_data_[CHROME_BROWSER].processes.push_back(info);
 }