Add name inference for anonymous functions to facilitate debugging and profiling of JS code.

src/frames.h

Index: src/frames.h
diff --git a/src/frames.h b/src/frames.h
index 8ab4be9051bd6babb6f78f4f8a5dd7c212b545fa..fbf99ffb42b9980027eacdf421c9a721a9aa1879 100644
--- a/src/frames.h
+++ b/src/frames.h
@@ -373,6 +373,7 @@ class JavaScriptFrame: public StandardFrame {
   virtual Type type() const { return JAVA_SCRIPT; }
 
   // Accessors.
+  inline bool is_at_function() const;
   inline Object* function() const;
   inline Object* receiver() const;
   inline void set_receiver(Object* value);
@@ -413,19 +414,11 @@ class JavaScriptFrame: public StandardFrame {
 
  protected:
   explicit JavaScriptFrame(StackFrameIterator* iterator)
-      : StandardFrame(iterator), disable_heap_access_(false) { }
+      : StandardFrame(iterator) { }
 
   virtual Address GetCallerStackPointer() const;
 
-  // When this mode is enabled it is not allowed to access heap objects.
-  // This is a special mode used when gathering stack samples in profiler.
-  // A shortcoming is that caller's SP value will be calculated incorrectly
-  // (see GetCallerStackPointer implementation), but it is not used for stack
-  // sampling.
-  void DisableHeapAccess() { disable_heap_access_ = true; }
-
  private:
-  bool disable_heap_access_;
   inline Object* function_slot_object() const;
 
   friend class StackFrameIterator;