Move memory histograms generation to MetricsMemoryDetails.

chrome/browser/memory_details_win.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 <psapi.h>
 #include <TlHelp32.h>
 
 #include "base/bind.h"
@@ skipping 19 matching lines @@
   CHROME_NACL_PROCESS,
   IE_BROWSER,
   FIREFOX_BROWSER,
   OPERA_BROWSER,
   SAFARI_BROWSER,
   IE_64BIT_BROWSER,
   KONQUEROR_BROWSER,
   MAX_BROWSERS
 } BrowserProcess;
 
-MemoryDetails::MemoryDetails()
-    : user_metrics_mode_(UPDATE_USER_METRICS),
-      memory_growth_tracker_(NULL) {
+MemoryDetails::MemoryDetails() {
   base::FilePath browser_process_path;
   PathService::Get(base::FILE_EXE, &browser_process_path);
   const base::string16 browser_process_name =
       browser_process_path.BaseName().value();
   const base::string16 google_browser_name =
       l10n_util::GetStringUTF16(IDS_PRODUCT_NAME);
 
   struct {
     const wchar_t* name;
     const wchar_t* process_name;
@@ skipping 107 matching lines @@
       }
       break;
     }
   } while (::Process32Next(snapshot.Get(), &process_entry));
 
   // Finally return to the browser thread.
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&MemoryDetails::CollectChildInfoOnUIThread, this));
 }