Made Isolate a mandatory parameter for everything Handle-related.

test/cctest/test-heap-profiler.cc

Index: test/cctest/test-heap-profiler.cc
diff --git a/test/cctest/test-heap-profiler.cc b/test/cctest/test-heap-profiler.cc
index a8a45b7b69e6c5ab458123dc0fa71946c8c772ba..7e3003eff3bc451685c8882ad6e54c6f50fb1a7a 100644
--- a/test/cctest/test-heap-profiler.cc
+++ b/test/cctest/test-heap-profiler.cc
@@ -1263,9 +1263,10 @@ TEST(NoHandleLeaks) {
   CompileRun("document = { URL:\"abcdefgh\" };");
 
   v8::Handle<v8::String> name(v8_str("leakz"));
-  int count_before = i::HandleScope::NumberOfHandles();
+  i::Isolate* isolate = i::Isolate::Current();
+  int count_before = i::HandleScope::NumberOfHandles(isolate);
   v8::HeapProfiler::TakeSnapshot(name);
-  int count_after = i::HandleScope::NumberOfHandles();
+  int count_after = i::HandleScope::NumberOfHandles(isolate);
   CHECK_EQ(count_before, count_after);
 }