Expose a low-end device mode override flags for non-android OSs as well

base/android/sys_utils.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 "base/android/sys_utils.h"
 
 #include "base/android/build_info.h"
+#include "base/lazy_instance.h"
 #include "base/sys_info.h"
+#include "base/sys_info_internal.h"
 #include "jni/SysUtils_jni.h"
 
 namespace base {
 namespace android {
 
-bool SysUtils::Register(JNIEnv* env) {
+bool SysUtilsAndroid::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
-bool SysUtils::IsLowEndDeviceFromJni() {
+bool SysUtilsAndroid::IsLowEndDeviceFromJni() {
   JNIEnv* env = AttachCurrentThread();
   return Java_SysUtils_isLowEndDevice(env);
 }
 
-bool SysUtils::IsLowEndDevice() {
-  static bool is_low_end = IsLowEndDeviceFromJni();
-  return is_low_end;
+}  // namespace android
+
+static base::LazyInstance<
+    base::internal::LazySysInfoValue<bool,
+        android::SysUtilsAndroid::IsLowEndDeviceFromJni> >::Leaky
+    g_lazy_low_end_device = LAZY_INSTANCE_INITIALIZER;
+
+bool SysInfo::IsLowEndDevice() {

[Yaron, 2014/06/23 18:48:00]

I think this should move to base/sys_info_android.cc since there's already code
there implementing SysInfo

[c.shu, 2014/06/23 18:56:40]

sounds good.

+  return g_lazy_low_end_device.Get().value();
 }
 
-size_t SysUtils::AmountOfPhysicalMemoryKBFromJni() {
-  JNIEnv* env = AttachCurrentThread();
-  return static_cast<size_t>(Java_SysUtils_amountOfPhysicalMemoryKB(env));
-}
-
-size_t SysUtils::AmountOfPhysicalMemoryKB() {
-  static size_t amount_of_ram = AmountOfPhysicalMemoryKBFromJni();
-  return amount_of_ram;
-}
-
-SysUtils::SysUtils() { }
-
-}  // namespace android
-}  // namespace base
+}  // namespace base