Do not send redundant selectionchange-events (decouple focus)

third_party/WebKit/Source/core/editing/EditingUtilities.h

Index: third_party/WebKit/Source/core/editing/EditingUtilities.h
diff --git a/third_party/WebKit/Source/core/editing/EditingUtilities.h b/third_party/WebKit/Source/core/editing/EditingUtilities.h
index ac562eb22beffb3690b0859479ab20ab1ad6b4a2..399c81440e0d399c15a261079f54b74340dd20ac 100644
--- a/third_party/WebKit/Source/core/editing/EditingUtilities.h
+++ b/third_party/WebKit/Source/core/editing/EditingUtilities.h
@@ -60,6 +60,7 @@ enum class DeleteDirection {
 
 class Document;
 class Element;
+class LocalFrame;
 class HTMLElement;
 class HTMLSpanElement;
 class Node;
@@ -81,6 +82,8 @@ CORE_EXPORT bool hasEditableStyle(const Node&);
 CORE_EXPORT bool hasRichlyEditableStyle(const Node&);
 CORE_EXPORT bool isRootEditableElement(const Node&);
 CORE_EXPORT Element* rootEditableElement(const Node&);
+bool isSelectionInDocument(const VisibleSelectionInFlatTree&, const Document&);

[yosin_UTC9, 2017/03/21 06:49:59]

Could you use |SelectionInFlatTree| instead of |VisibleSelectionInFlatTree|?
We are working to reduce usage of |VisibleSelection|.

[hugoh_UTC2, 2017/03/22 02:54:47]

Yes, PendingSelection::commit has a |SelectionInFlatTree| already, the one it
constructs by calling calcVisibleSelection(). I try this in PS24.

+bool selectionHasFocus(const LocalFrame&);
 Element* rootEditableElementOf(const Position&);
 Element* rootEditableElementOf(const PositionInFlatTree&);
 Element* rootEditableElementOf(const VisiblePosition&);