Fix Heap::IsHeapIterable.

test/cctest/test-api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 13496 matching lines @@
     Local<Script> script = v8_compile("(function () {"
                                       "  unlock_for_a_moment();"
                                       "  return 42;"
                                       "})();");
     CHECK_EQ(42, script->Run()->Int32Value());
   }
 }
 
 
 static int GetGlobalObjectsCount() {
-  CcTest::heap()->EnsureHeapIsIterable();
   int count = 0;
   i::HeapIterator it(CcTest::heap());
   for (i::HeapObject* object = it.next(); object != NULL; object = it.next())
     if (object->IsJSGlobalObject()) count++;
   return count;
 }
 
 
 static void CheckSurvivingGlobalObjectsCount(int expected) {
   // We need to collect all garbage twice to be sure that everything
@@ skipping 9079 matching lines @@
   v8::internal::FLAG_stack_size = 150;
   LocalContext current;
   v8::Isolate* isolate = current->GetIsolate();
   v8::HandleScope scope(isolate);
   V8::SetCaptureStackTraceForUncaughtExceptions(
       true, 10, v8::StackTrace::kDetailed);
   v8::TryCatch try_catch;
   CompileRun("(function f(x) { f(x+1); })(0)");
   CHECK(try_catch.HasCaught());
 }