Move system.* family of APIs to extensions/

chrome/browser/extensions/api/system_memory/memory_info_provider.cc

-// Copyright 2013 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_memory/memory_info_provider.h"
-
-#include "base/sys_info.h"
-
-namespace extensions {
-
-using api::system_memory::MemoryInfo;
-
-// Static member intialization.
-base::LazyInstance<scoped_refptr<MemoryInfoProvider> >
-    MemoryInfoProvider::provider_ = LAZY_INSTANCE_INITIALIZER;
-
-MemoryInfoProvider::MemoryInfoProvider() {}
-
-MemoryInfoProvider::~MemoryInfoProvider() {}
-
-const MemoryInfo& MemoryInfoProvider::memory_info() const {
-  return info_;
-}
-
-void MemoryInfoProvider::InitializeForTesting(
-    scoped_refptr<MemoryInfoProvider> provider) {
-  DCHECK(provider.get() != NULL);
-  provider_.Get() = provider;
-}
-
-bool MemoryInfoProvider::QueryInfo() {
-  info_.capacity = static_cast<double>(base::SysInfo::AmountOfPhysicalMemory());
-  info_.available_capacity =
-      static_cast<double>(base::SysInfo::AmountOfAvailablePhysicalMemory());
-  return true;
-}
-
-// static
-MemoryInfoProvider* MemoryInfoProvider::Get() {
-  if (provider_.Get().get() == NULL)
-    provider_.Get() = new MemoryInfoProvider();
-  return provider_.Get();
-}
-
-}  // namespace extensions