Provide a counter for thrown JavaScript errors per context

src/contexts.cc

Index: src/contexts.cc
diff --git a/src/contexts.cc b/src/contexts.cc
index 9da13fe9e8a00665090f207aa7c6d7066d234bb4..d5cbf21cb7b33605b5657b567955925b933184aa 100644
--- a/src/contexts.cc
+++ b/src/contexts.cc
@@ -577,5 +577,18 @@ bool Context::IsBootstrappingOrGlobalObject(Isolate* isolate, Object* object) {
 }
 #endif
 
+
+void Context::IncrementErrorsThrown() {
+  DCHECK(IsNativeContext());
+
+  int previous_value = errors_thrown()->value();
+  set_errors_thrown(Smi::FromInt(previous_value+1));

[Yang, 2015/11/05 07:50:01]

I think "git cl format" would add spaces around +.

[Michael Hablich, 2015/11/05 13:23:11]

Done.

+}
+
+
+int Context::GetErrorsThrown() {
+  return errors_thrown()->value();
+}
+
 }  // namespace internal
 }  // namespace v8