Enable allocation tracing for classes owned by vm isolate

runtime/vm/stub_code_arm.cc

Index: runtime/vm/stub_code_arm.cc
diff --git a/runtime/vm/stub_code_arm.cc b/runtime/vm/stub_code_arm.cc
index 7023472aac8707d96d557eae0822ce45e01471ef..153f705ca7fe615615fb1e7676cbff2e02433f9a 100644
--- a/runtime/vm/stub_code_arm.cc
+++ b/runtime/vm/stub_code_arm.cc
@@ -850,6 +850,8 @@ void StubCode::GenerateAllocateContextStub(Assembler* assembler) {
     ASSERT(kSmiTagShift == 1);
     __ bic(R2, R2, Operand(kObjectAlignment - 1));
 
+    __ MaybeTraceAllocation(kContextCid, R4, &slow_case,
+                            /* inline_isolate = */ false);
     // Now allocate the object.
     // R1: number of context variables.
     // R2: object size.
@@ -1048,8 +1050,9 @@ void StubCode::GenerateAllocationStubForClass(
   const int kInlineInstanceSize = 12;
   const intptr_t instance_size = cls.instance_size();
   ASSERT(instance_size > 0);
+  Isolate* isolate = Isolate::Current();
   if (FLAG_inline_alloc && Heap::IsAllocatableInNewSpace(instance_size) &&
-      !cls.trace_allocation()) {
+      !cls.TraceAllocation(isolate)) {
     Label slow_case;
     // Allocate the object and update top to point to
     // next object start and initialize the allocated object.