Pass explicit Isolate parameter to v8::Debug methods that need it

test/cctest/test-heap.cc

Index: test/cctest/test-heap.cc
diff --git a/test/cctest/test-heap.cc b/test/cctest/test-heap.cc
index df317af00b41f8e8cb8bd73a00ee612eecc77803..cc7d473be8591eca559580289b6212099d855b62 100644
--- a/test/cctest/test-heap.cc
+++ b/test/cctest/test-heap.cc
@@ -1500,10 +1500,10 @@ TEST(TestCodeFlushingIncrementalAbort) {
   // disabled.
   int position = 0;
   Handle<Object> breakpoint_object(Smi::FromInt(0), isolate);
-  EnableDebugger();
+  EnableDebugger(CcTest::isolate());
   isolate->debug()->SetBreakPoint(function, breakpoint_object, &position);
   isolate->debug()->ClearAllBreakPoints();
-  DisableDebugger();
+  DisableDebugger(CcTest::isolate());
 
   // Force optimization now that code flushing is disabled.
   { v8::HandleScope scope(CcTest::isolate());