Dont blur currently focused element on clicking scrollbar.

third_party/WebKit/Source/core/input/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 1614 matching lines @@
 // The return value means 'continue default handling.'
 bool EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, int clickCount, const PlatformMouseEvent& mouseEvent)
 {
     updateMouseEventTargetNode(targetNode, mouseEvent);
     return !m_nodeUnderMouse || m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventType, clickCount);
 }
 
 // The return value means 'swallow event' (was handled), as for other handle* functions.
 bool EventHandler::handleMouseFocus(const MouseEventWithHitTestResults& targetedEvent, InputDeviceCapabilities* sourceCapabilities)
 {
-    const PlatformMouseEvent& mouseEvent = targetedEvent.event();
-
     // If clicking on a frame scrollbar, do not mess up with content focus.
-    if (FrameView* view = m_frame->view()) {
-        if (view->scrollbarAtRootFramePoint(mouseEvent.position()))
+    if (targetedEvent.hitTestResult().scrollbar() && m_frame->contentLayoutObject()) {
+        if (targetedEvent.hitTestResult().scrollbar()->scrollableArea() == m_frame->contentLayoutObject()->scrollableArea())
             return false;
     }
 
     // The layout needs to be up to date to determine if an element is focusable.
     m_frame->document()->updateLayoutIgnorePendingStylesheets();
 
     Element* element = nullptr;
     if (m_nodeUnderMouse)
         element = m_nodeUnderMouse->isElementNode() ? toElement(m_nodeUnderMouse) : m_nodeUnderMouse->parentOrShadowHostElement();
     for (; element; element = element->parentOrShadowHostElement()) {
@@ skipping 2388 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace blink