[debugger] correctly find function context.

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index d01ddafccc651221cf88bd5898dc553d7d31586b..4aa7d971c59b52326e1d1dfb6fe16ffe094cb134 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -450,6 +450,9 @@ class Context: public FixedArray {
   Context* declaration_context();
   bool is_declaration_context();
 
+  // Get the next local context on the context chain.
+  Context* local_context();

[rossberg, 2016/01/29 19:46:25]

Nit: Scope has an analogous method called ClosureScope, so I'd prefer
"closure_context", which is a somewhat more telling name as well.

[Yang, 2016/02/01 06:28:45]

Done.

+
   // Returns a JSGlobalProxy object or null.
   JSObject* global_proxy();
   void set_global_proxy(JSObject* global);