remove HEAP from tests

test/cctest/test-object-observe.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 426 matching lines @@
           i::GetProperty(observation_state, "callbackInfoMap"));
   i::Handle<i::JSWeakMap> objectInfoMap =
       i::Handle<i::JSWeakMap>::cast(
           i::GetProperty(observation_state, "objectInfoMap"));
   i::Handle<i::JSWeakMap> notifierObjectInfoMap =
       i::Handle<i::JSWeakMap>::cast(
           i::GetProperty(observation_state, "notifierObjectInfoMap"));
   CHECK_EQ(1, NumberOfElements(callbackInfoMap));
   CHECK_EQ(1, NumberOfElements(objectInfoMap));
   CHECK_EQ(1, NumberOfElements(notifierObjectInfoMap));
-  HEAP->CollectAllGarbage(i::Heap::kAbortIncrementalMarkingMask);
+  i_isolate->heap()->CollectAllGarbage(i::Heap::kAbortIncrementalMarkingMask);
   CHECK_EQ(0, NumberOfElements(callbackInfoMap));
   CHECK_EQ(0, NumberOfElements(objectInfoMap));
   CHECK_EQ(0, NumberOfElements(notifierObjectInfoMap));
 }
 
 
 static bool NamedAccessAlwaysAllowed(Local<Object>, Local<Value>, AccessType,
                                      Local<Value>) {
   return true;
 }
@@ skipping 251 matching lines @@
     instance->Set(String::New("foo"), String::New("bar"));
     CompileRun("");  // trigger delivery
     const RecordExpectation expected_records2[] = {
       { instance, "new", "5", Handle<Value>() },
       { instance, "new", "foo", Handle<Value>() }
     };
     EXPECT_RECORDS(CompileRun("records2"), expected_records2);
   }
   CHECK(CompileRun("records")->IsNull());
 }