Revert change 6302 until the compiler warning is addressed.

vm/stack_frame.h

Index: vm/stack_frame.h
===================================================================
--- vm/stack_frame.h	(revision 6302)
+++ vm/stack_frame.h	(working copy)
@@ -54,10 +54,6 @@
   virtual bool IsEntryFrame() const { return false; }
   virtual bool IsExitFrame() const { return false; }
 
-  // Find code object corresponding to pc (valid only for DartFrame and
-  // StubFrame.
-  static RawCode* LookupCode(Isolate* isolate, uword pc);
-
  protected:
   StackFrame() : fp_(0), sp_(0) { }
 
@@ -65,21 +61,6 @@
   virtual const char* GetName() const = 0;
 
  private:
-  // An object finder visitor interface.
-  class FindRawCodeVisitor : public FindObjectVisitor {
-   public:
-    explicit FindRawCodeVisitor(uword pc) : pc_(pc) { }
-    virtual ~FindRawCodeVisitor() { }
-
-    // Check if object matches find condition.
-    virtual bool FindObject(RawObject* obj);
-
-   private:
-    uword pc_;
-
-    DISALLOW_COPY_AND_ASSIGN(FindRawCodeVisitor);
-  };
-
   // Target specific implementations for locating pc and caller fp/sp values.
   static intptr_t PcAddressOffsetFromSp();
   uword GetCallerSp() const;