Track heap objects.

src/arm/stub-cache-arm.cc

Index: src/arm/stub-cache-arm.cc
diff --git a/src/arm/stub-cache-arm.cc b/src/arm/stub-cache-arm.cc
index 127bf3fdd96832a266ccc8f828f8173866932a95..5d10a7e73bce9df195aabe1e89c60dc4902d55fd 100644
--- a/src/arm/stub-cache-arm.cc
+++ b/src/arm/stub-cache-arm.cc
@@ -516,6 +516,8 @@ void StubCompiler::GenerateStoreTransition(MacroAssembler* masm,
 
   if (FLAG_track_fields && representation.IsSmi()) {
     __ JumpIfNotSmi(value_reg, miss_restore_name);
+  } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
+    __ JumpIfSmi(value_reg, miss_restore_name);
   } else if (FLAG_track_double_fields && representation.IsDouble()) {
     Label do_store, heap_number;
     __ LoadRoot(scratch3, Heap::kHeapNumberMapRootIndex);
@@ -685,6 +687,8 @@ void StubCompiler::GenerateStoreField(MacroAssembler* masm,
   ASSERT(!representation.IsNone());
   if (FLAG_track_fields && representation.IsSmi()) {
     __ JumpIfNotSmi(value_reg, miss_label);
+  } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
+    __ JumpIfSmi(value_reg, miss_label);
   } else if (FLAG_track_double_fields && representation.IsDouble()) {
     // Load the double storage.
     if (index < 0) {