Make browsing context keywords case-insensitive.

third_party/WebKit/Source/core/page/FrameTree.cpp

 /*
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 114 matching lines @@
 
 unsigned FrameTree::childCount() const {
   unsigned count = 0;
   for (Frame* result = firstChild(); result;
        result = result->tree().nextSibling())
     ++count;
   return count;
 }
 
 Frame* FrameTree::find(const AtomicString& name) const {
-  if (name == "_self" || name == "_current" || name.isEmpty())
+  if (equalIgnoringASCIICase(name, "_self") ||
+      equalIgnoringASCIICase(name, "_current") || name.isEmpty())
     return m_thisFrame;
 
-  if (name == "_top")
+  if (equalIgnoringASCIICase(name, "_top"))
     return top();
 
-  if (name == "_parent")
+  if (equalIgnoringASCIICase(name, "_parent"))
     return parent() ? parent() : m_thisFrame.get();
 
   // Since "_blank" should never be any frame's name, the following just amounts
   // to an optimization.
-  if (name == "_blank")
+  if (equalIgnoringASCIICase(name, "_blank"))
     return nullptr;
 
   // Search subtree starting with this frame first.
   for (Frame* frame = m_thisFrame; frame;
        frame = frame->tree().traverseNext(m_thisFrame)) {
     if (frame->tree().name() == name)
       return frame;
   }
 
   // Search the entire tree for this page next.
@@ skipping 120 matching lines @@
 void showFrameTree(const blink::Frame* frame) {
   if (!frame) {
     printf("Null input frame\n");
     return;
   }
 
   printFrames(frame->tree().top(), frame, 0);
 }
 
 #endif