Disable copy constructor in public: section or use macro.

src/frames.h

Index: src/frames.h
diff --git a/src/frames.h b/src/frames.h
index 12770231cf2f293800c0c777a25ebd9144de9c5d..102372886cb56409d35e076214d9442bef314be5 100644
--- a/src/frames.h
+++ b/src/frames.h
@@ -525,6 +525,8 @@ class StackFrame BASE_EMBEDDED {
 
   Isolate* isolate() const { return isolate_; }
 
+  void operator=(const StackFrame& original) = delete;
+
  protected:
   inline explicit StackFrame(StackFrameIteratorBase* iterator);
   virtual ~StackFrame() { }
@@ -563,9 +565,6 @@ class StackFrame BASE_EMBEDDED {
   friend class StackFrameIteratorBase;
   friend class StackHandlerIterator;
   friend class SafeStackFrameIterator;
-
- private:
-  void operator=(const StackFrame& original);
 };