[ES6 modules] Fix context leak. ModuleScript should use TraceWrapperV8Reference to hold onto v8::Mo…

third_party/WebKit/Source/core/testing/DummyModulator.cpp

Index: third_party/WebKit/Source/core/testing/DummyModulator.cpp
diff --git a/third_party/WebKit/Source/core/testing/DummyModulator.cpp b/third_party/WebKit/Source/core/testing/DummyModulator.cpp
index a4bfe40b9211acd88531f6d20148fc5c854fa2a5..d5c46fdeb5fb1a3216093f5292e3c29d27d2c575 100644
--- a/third_party/WebKit/Source/core/testing/DummyModulator.cpp
+++ b/third_party/WebKit/Source/core/testing/DummyModulator.cpp
@@ -48,6 +48,11 @@ SecurityOrigin* DummyModulator::GetSecurityOrigin() {
   return nullptr;
 }
 
+ScriptState* DummyModulator::GetScriptState() {
+  NOTREACHED();
+  return nullptr;
+}
+
 ScriptModuleResolver* DummyModulator::GetScriptModuleResolver() {
   return resolver_.Get();
 }