NOT YET READY: Improve granularity of window namespaces in Blink.

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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "core/page/FrameTree.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/FrameClient.h"
 #include "core/frame/LocalFrame.h"
+#include "core/frame/LocalFrameClient.h"
 #include "core/frame/LocalFrameView.h"
 #include "core/frame/RemoteFrame.h"
 #include "core/frame/RemoteFrameView.h"
 #include "core/frame/UseCounter.h"
 #include "core/page/Page.h"
 #include "platform/wtf/Assertions.h"
 #include "platform/wtf/Vector.h"
 #include "platform/wtf/text/CString.h"
 #include "platform/wtf/text/StringBuilder.h"
 
@@ skipping 155 matching lines @@
   if (!page)
     return nullptr;
 
   for (Frame* frame = page->MainFrame(); frame;
        frame = frame->Tree().TraverseNext()) {
     if (frame->Tree().GetName() == name)
       return frame;
   }
 
   // Search the entire tree of each of the other pages in this namespace.
-  // FIXME: Is random order OK?
-  for (const Page* other_page : Page::OrdinaryPages()) {
+  for (const Page* other_page : page->RelatedPages()) {
     if (other_page == page || other_page->IsClosing())
       continue;
     for (Frame* frame = other_page->MainFrame(); frame;
          frame = frame->Tree().TraverseNext()) {
       if (frame->Tree().GetName() == name)
         return frame;
     }
   }
 
-  return nullptr;
+  // Ask the embedder as a fallback.
+  return ToLocalFrame(this_frame_)->Client()->FindFrame(name);
 }
 
 bool FrameTree::IsDescendantOf(const Frame* ancestor) const {
   if (!ancestor)
     return false;
 
   if (this_frame_->GetPage() != ancestor->GetPage())
     return false;
 
   for (Frame* frame = this_frame_; frame; frame = frame->Tree().Parent()) {
@@ skipping 86 matching lines @@
 void showFrameTree(const blink::Frame* frame) {
   if (!frame) {
     printf("Null input frame\n");
     return;
   }
 
   printFrames(&frame->Tree().Top(), frame, 0);
 }
 
 #endif