Rollback of r14496 in trunk branch.

src/frames.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 951 matching lines @@
   StackFrameIterator iterator_;
 };
 
 
 typedef JavaScriptFrameIteratorTemp<SafeStackFrameIterator>
     SafeJavaScriptFrameIterator;
 
 
 class SafeStackTraceFrameIterator: public SafeJavaScriptFrameIterator {
  public:
-  SafeStackTraceFrameIterator(Isolate* isolate,
-                              Address fp,
-                              Address sp,
-                              Address low_bound,
-                              Address high_bound);
+  explicit SafeStackTraceFrameIterator(Isolate* isolate,
+                                       Address fp, Address sp,
+                                       Address low_bound, Address high_bound);
   void Advance();
 };
 
 
 class StackFrameLocator BASE_EMBEDDED {
  public:
   explicit StackFrameLocator(Isolate* isolate) : iterator_(isolate) {}
 
   // Find the nth JavaScript frame on the stack. The caller must
   // guarantee that such a frame exists.
   JavaScriptFrame* FindJavaScriptFrame(int n);
 
  private:
   StackFrameIterator iterator_;
 };
 
 
 // Reads all frames on the current stack and copies them into the current
 // zone memory.
 Vector<StackFrame*> CreateStackMap(Isolate* isolate, Zone* zone);
 
 } }  // namespace v8::internal
 
 #endif  // V8_FRAMES_H_