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

base/memory/discardable_memory_android.cc

Index: base/memory/discardable_memory_android.cc
diff --git a/base/memory/discardable_memory_android.cc b/base/memory/discardable_memory_android.cc
index fa89c189db7be5170ecf30ea3a2a882c24fc87db..294a4ebe5194075d0671925cf84073aa703e2a21 100644
--- a/base/memory/discardable_memory_android.cc
+++ b/base/memory/discardable_memory_android.cc
@@ -4,7 +4,6 @@
 
 #include "base/memory/discardable_memory.h"
 
-#include "base/android/sys_utils.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/lazy_instance.h"
@@ -12,6 +11,7 @@
 #include "base/memory/discardable_memory_allocator_android.h"
 #include "base/memory/discardable_memory_emulated.h"
 #include "base/memory/discardable_memory_malloc.h"
+#include "base/sys_utils.h"
 
 namespace base {
 namespace {
@@ -31,7 +31,7 @@ struct DiscardableMemoryAllocatorWrapper {
   static size_t GetOptimalAshmemRegionSizeForAllocator() {
     // Note that this may do some I/O (without hitting the disk though) so it
     // should not be called on the critical path.
-    return base::android::SysUtils::AmountOfPhysicalMemoryKB() * 1024 / 8;
+    return base::SysUtils::AmountOfPhysicalMemoryKB() * 1024 / 8;
   }
 };