Move memory histograms generation to MetricsMemoryDetails.

chrome/browser/memory_details_android.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 <vector>
 
@@ skipping 78 matching lines @@
       }
     }
 
     wavefront.clear();
     wavefront.swap(next_wavefront);
   }
 }
 
 }  // namespace
 
-MemoryDetails::MemoryDetails()
-    : user_metrics_mode_(UPDATE_USER_METRICS),
-      memory_growth_tracker_(NULL) {
+MemoryDetails::MemoryDetails() {
 }
 
 ProcessData* MemoryDetails::ChromeBrowser() {
   return &process_data_[0];
 }
 
 void MemoryDetails::CollectProcessData(
     const std::vector<ProcessMemoryInformation>& chrome_processes) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
 
@@ skipping 21 matching lines @@
   current_browser.name = l10n_util::GetStringUTF16(IDS_PRODUCT_NAME);
   current_browser.process_name =
       base::ASCIIToUTF16(chrome::kBrowserProcessExecutableName);
   process_data_.push_back(current_browser);
 
   // Finally return to the browser thread.
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&MemoryDetails::CollectChildInfoOnUIThread, this));
 }