Fix to keep the selection of the text field in input element after setSelectionRange is called by d…

Source/core/page/EventHandler.cpp

Index: Source/core/page/EventHandler.cpp
diff --git a/Source/core/page/EventHandler.cpp b/Source/core/page/EventHandler.cpp
index b95b1f66f6fd24317f10be61ab00b92a7e0cd369..14efec97622e5f6e2b18ab404f117de63cab9c3d 100644
--- a/Source/core/page/EventHandler.cpp
+++ b/Source/core/page/EventHandler.cpp
@@ -619,7 +619,6 @@ bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& eve
 
     bool swallowEvent = false;
     m_mousePressed = true;
-    m_selectionInitiationState = HaveNotStartedSelection;
 
     if (event.event().clickCount() == 2)
         swallowEvent = handleMousePressEventDoubleClick(event);
@@ -1285,6 +1284,7 @@ bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent)
     m_frame->selection().setCaretBlinkingSuspended(true);
 
     bool swallowEvent = !dispatchMouseEvent(EventTypeNames::mousedown, mev.targetNode(), m_clickCount, mouseEvent, true);
+    m_selectionInitiationState = HaveNotStartedSelection;

[Rick Byers, 2014/09/02 15:39:20]

Please add a comment here saying why we don't consider selection to start until
after the mousedown event (and that it's more compatible with other browsers).

     swallowEvent = swallowEvent || handleMouseFocus(mouseEvent);
     m_capturesDragging = !swallowEvent || mev.scrollbar();
 
@@ -2951,6 +2951,11 @@ void EventHandler::notifyElementActivated()
     m_lastDeferredTapElement = nullptr;
 }
 
+void EventHandler::notifySelectionChanged()
+{
+    m_selectionInitiationState = ExtendedSelection;
+}
+
 bool EventHandler::handleAccessKey(const PlatformKeyboardEvent& evt)
 {
     // FIXME: Ignoring the state of Shift key is what neither IE nor Firefox do.