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

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

Index: third_party/WebKit/Source/core/page/FrameTree.cpp
diff --git a/third_party/WebKit/Source/core/page/FrameTree.cpp b/third_party/WebKit/Source/core/page/FrameTree.cpp
index d12d5c443e8b242f6b72f5b4889b337ea1a5d9d9..9fd8fbdc26a8dc2b6c0ec9f3c7ba4dc471e51e78 100644
--- a/third_party/WebKit/Source/core/page/FrameTree.cpp
+++ b/third_party/WebKit/Source/core/page/FrameTree.cpp
@@ -23,6 +23,7 @@
 #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"
@@ -198,8 +199,7 @@ Frame* FrameTree::Find(const AtomicString& name) const {
   }
 
   // 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;
@@ -209,7 +209,8 @@ Frame* FrameTree::Find(const AtomicString& name) const {
     }
   }
 
-  return nullptr;
+  // Ask the embedder as a fallback.
+  return ToLocalFrame(this_frame_)->Client()->FindFrame(name);
 }
 
 bool FrameTree::IsDescendantOf(const Frame* ancestor) const {