Make GpuDataManager thread safe.

chrome/browser/ui/webui/gpu_internals_ui.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/ui/webui/gpu_internals_ui.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 222 matching lines @@
 #endif
   dict->SetString("blacklist_version",
       GpuBlacklist::GetInstance()->GetVersion());
 
   return dict;
 }
 
 Value* GpuMessageHandler::OnRequestLogMessages(const ListValue*) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
-  return GpuDataManager::GetInstance()->GetLogMessages().DeepCopy();
+  return GpuDataManager::GetInstance()->GetLogMessages();
 }
 
 Value* GpuMessageHandler::OnRequestCrashList(const ListValue*) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   if (!CrashesUI::CrashReportingEnabled()) {
     // We need to return an empty list instead of NULL.
     return new ListValue;
   }
   if (!crash_list_available_) {
@@ skipping 45 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 
 GpuInternalsUI::GpuInternalsUI(content::WebUI* web_ui)
     : WebUIController(web_ui) {
   web_ui->AddMessageHandler(new GpuMessageHandler());
 
   // Set up the chrome://gpu-internals/ source.
   Profile* profile = Profile::FromWebUI(web_ui);
   ChromeURLDataManager::AddDataSource(profile, CreateGpuHTMLSource());
 }