Make sure Document::updateLayoutTree*() is called before Element::isFocusable().

third_party/WebKit/Source/core/editing/FrameSelection.cpp

Index: third_party/WebKit/Source/core/editing/FrameSelection.cpp
diff --git a/third_party/WebKit/Source/core/editing/FrameSelection.cpp b/third_party/WebKit/Source/core/editing/FrameSelection.cpp
index b51173b7bff61bb2ec2393b037a0360637a3abdf..194d1ec516857aac7d93891c5319231213113866 100644
--- a/third_party/WebKit/Source/core/editing/FrameSelection.cpp
+++ b/third_party/WebKit/Source/core/editing/FrameSelection.cpp
@@ -1103,6 +1103,7 @@ void FrameSelection::setFocusedNodeIfNeeded()
 
     if (Element* target = rootEditableElement()) {
         // Walk up the DOM tree to search for a node to focus.
+        m_frame->document()->updateLayoutTreeIgnorePendingStylesheets();
         while (target) {
             // We don't want to set focus on a subframe when selecting in a parent frame,
             // so add the !isFrameElement check here. There's probably a better way to make this