Coverity: Pass values by reference.

chrome/browser/memory_details_win.cc

 // Copyright (c) 2011 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 "base/file_path.h"
 #include "base/file_version_info.h"
@@ skipping 47 matching lines @@
     process.process_name = process_template[index].process_name;
     process_data_.push_back(process);
   }
 }
 
 ProcessData* MemoryDetails::ChromeBrowser() {
   return &process_data_[CHROME_BROWSER];
 }
 
 void MemoryDetails::CollectProcessData(
-    std::vector<ProcessMemoryInformation> child_info) {
+    const std::vector<ProcessMemoryInformation>& child_info) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
 
   // Clear old data.
   for (unsigned int index = 0; index < process_data_.size(); index++)
     process_data_[index].processes.clear();
 
   base::win::WindowsArchitecture windows_architecture =
       base::win::GetWindowsArchitecture();
 
   base::win::ScopedHandle snapshot(
@@ skipping 72 matching lines @@
       }
       break;
     }
   } while (::Process32Next(snapshot, &process_entry));
 
   // Finally return to the browser thread.
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       NewRunnableMethod(this, &MemoryDetails::CollectChildInfoOnUIThread));
 }