[SystemInfo API] Finish TODOs in SystemInfoProvider

chrome/browser/extensions/api/system_info_cpu/cpu_info_provider.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/extensions/api/system_info_cpu/cpu_info_provider.h"
 
 #include "base/sys_info.h"
 
 namespace extensions {
 
 using api::system_info_cpu::CpuInfo;
 
 CpuInfoProvider::CpuInfoProvider() {}
 
 CpuInfoProvider::~CpuInfoProvider() {}
 
-bool CpuInfoProvider::QueryInfo(CpuInfo* info) {
-  if (info == NULL)
-    return false;
+const CpuInfo* CpuInfoProvider::cpu_info() const {
+  return &info_;
+}
+
+void CpuInfoProvider::QueryInfo() {
+  CpuInfo* info = &info_;
 
   info->num_of_processors = base::SysInfo::NumberOfProcessors();
   info->arch_name = base::SysInfo::OperatingSystemArchitecture();
   info->model_name = base::SysInfo::CPUModelName();
-  return true;
+  success_ = true;
 }
 
 // static
 CpuInfoProvider* CpuInfoProvider::Get() {
   return CpuInfoProvider::GetInstance<CpuInfoProvider>();
 }
 
 }  // namespace extensions