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

base/sys_info_android.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 "base/sys_info.h"
 
 #include <sys/system_properties.h>
 
+#include "base/android/sys_utils.h"
+#include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/stringprintf.h"
+#include "base/sys_info_internal.h"
 
 namespace {
 
 // Default version of Android to fall back to when actual version numbers
 // cannot be acquired. This is an obviously invalid version number. Code
 // doing version comparison should treat it as so and fail all comparisons.
 const int kDefaultAndroidMajorVersion = 0;
 const int kDefaultAndroidMinorVersion = 0;
 const int kDefaultAndroidBugfixVersion = 0;
 
@@ skipping 132 matching lines @@
 int SysInfo::DalvikHeapSizeMB() {
   static int heap_size = GetDalvikHeapSizeMB();
   return heap_size;
 }
 
 int SysInfo::DalvikHeapGrowthLimitMB() {
   static int heap_growth_limit = GetDalvikHeapGrowthLimitMB();
   return heap_growth_limit;
 }
 
+static base::LazyInstance<
+    base::internal::LazySysInfoValue<bool,
+        android::SysUtils::IsLowEndDeviceFromJni> >::Leaky
+    g_lazy_low_end_device = LAZY_INSTANCE_INITIALIZER;
+
+bool SysInfo::IsLowEndDevice() {
+  return g_lazy_low_end_device.Get().value();
+}
+
 
 }  // namespace base