Do not send redundant selectionchange-events (decouple focus)

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

Index: third_party/WebKit/Source/core/editing/PendingSelection.cpp
diff --git a/third_party/WebKit/Source/core/editing/PendingSelection.cpp b/third_party/WebKit/Source/core/editing/PendingSelection.cpp
index 1b106656d49673990d8f12016ed2f04fad889264..6317e9a83b714e578d9016c6384677ea3b644ee6 100644
--- a/third_party/WebKit/Source/core/editing/PendingSelection.cpp
+++ b/third_party/WebKit/Source/core/editing/PendingSelection.cpp
@@ -38,23 +38,6 @@ const VisibleSelection& PendingSelection::visibleSelection() const {
   return m_frameSelection->computeVisibleSelectionInDOMTree();
 }
 
-static bool isSelectionInDocument(
-    const VisibleSelectionInFlatTree& visibleSelection,
-    const Document& document) {
-  const PositionInFlatTree& start = visibleSelection.start();
-  if (start.isNotNull() &&
-      (!start.isConnected() || start.document() != document))
-    return false;
-  const PositionInFlatTree& end = visibleSelection.end();
-  if (end.isNotNull() && (!end.isConnected() || end.document() != document))
-    return false;
-  const PositionInFlatTree extent = visibleSelection.extent();
-  if (extent.isNotNull() &&
-      (!extent.isConnected() || extent.document() != document))
-    return false;
-  return true;
-}
-
 SelectionInFlatTree PendingSelection::calcVisibleSelection(
     const VisibleSelectionInFlatTree& originalSelection) const {
   const PositionInFlatTree& start = originalSelection.start();
@@ -126,7 +109,8 @@ void PendingSelection::commit(LayoutView& layoutView) {
   const VisibleSelectionInFlatTree& selection =
       createVisibleSelection(calcVisibleSelection(originalSelection));
 
-  if (!selection.isRange()) {
+  const LocalFrame& frame = *layoutView.document().frame();
+  if (!selection.isRange() || !selectionHasFocus(frame)) {
     layoutView.clearSelection();
     return;
   }