FrameTree::Find only searches relative to local frames.

third_party/WebKit/Source/core/frame/Frame.h

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999-2001 Lars Knoll <knoll@kde.org>
  *                     1999-2001 Antti Koivisto <koivisto@kde.org>
  *                     2000-2001 Simon Hausmann <hausmann@kde.org>
  *                     2000-2001 Dirk Mueller <mueller@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 87 matching lines @@
   void SetOwner(FrameOwner* owner) { owner_ = owner; }
   HTMLFrameOwnerElement* DeprecatedLocalOwner() const;
 
   DOMWindow* DomWindow() const { return dom_window_; }
 
   FrameTree& Tree() const;
   ChromeClient& GetChromeClient() const;
 
   virtual SecurityContext* GetSecurityContext() const = 0;
 
-  Frame* FindFrameForNavigation(const AtomicString& name, Frame& active_frame);
   Frame* FindUnsafeParentScrollPropagationBoundary();
 
   // This prepares the Frame for the next commit. It will detach children,
   // dispatch unload events, abort XHR requests and detach the document.
   // Returns true if the frame is ready to receive the next commit, or false
   // otherwise.
   virtual bool PrepareForCommit() = 0;
 
   // TODO(japhet): These should all move to LocalFrame.
   bool CanNavigate(const Frame&);
@@ skipping 68 matching lines @@
   return tree_node_;
 }
 
 // Allow equality comparisons of Frames by reference or pointer,
 // interchangeably.
 DEFINE_COMPARISON_OPERATORS_WITH_REFERENCES(Frame)
 
 }  // namespace blink
 
 #endif  // Frame_h