[Android] Set V8 is_memory_constrained ResourceConstraint on Android.

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 085d4524cd96ff51d319ec2cb44c2bc4e8f5464f..6728faa3455fa2b4eb11a24ab3ef1718f76f17ef 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -127,6 +127,7 @@
 
 #if defined(OS_ANDROID)
 #include <cpu-features.h>
+#include "base/android/sys_utils.h"
 #include "content/renderer/android/synchronous_compositor_factory.h"
 #endif
 
@@ -323,6 +324,13 @@ void RenderThreadImpl::Init() {
   v8::V8::SetCreateHistogramFunction(CreateHistogram);
   v8::V8::SetAddHistogramSampleFunction(AddHistogramSample);
 
+#if defined(OS_ANDROID)
+  bool is_memory_constrained = base::android::SysUtils::IsLowEndDevice();
+  v8::ResourceConstraints resourceConstraints;
+  resourceConstraints.set_memory_constrained(&is_memory_constrained);

[jamesr, 2013/09/06 00:24:04]

can you please show me where this API is provided?  I don't see it in
https://code.google.com/p/v8/source/browse/trunk/include/v8.h

+  v8::SetResourceConstraints(&resourceConstraints);
+#endif
+
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
   // On Mac and Android, the select popups are rendered by the browser.
   WebKit::WebView::setUseExternalPopupMenus(true);