move HEAP to /test

test/cctest/cctest.h

Index: test/cctest/cctest.h
diff --git a/test/cctest/cctest.h b/test/cctest/cctest.h
index 3365493d3d007fab4881e8dfa65665e48a9124b5..ceb97743eb81ecedcdf89b8aca2558b0fc14c5bb 100644
--- a/test/cctest/cctest.h
+++ b/test/cctest/cctest.h
@@ -71,6 +71,10 @@ typedef v8::internal::EnumSet<CcTestExtensionIds> CcTestExtensionFlags;
   EXTENSION_LIST(DEFINE_EXTENSION_FLAG)
 #undef DEFINE_EXTENSION_FLAG
 
+// Temporary macros for accessing current isolate and its subobjects.
+// They provide better readability, especially when used a lot in the code.
+#define HEAP (v8::internal::Isolate::Current()->heap())
+
 class CcTest {
  public:
   typedef void (TestFunction)();