[WIP Approach 2] Straighten up input method reactivation

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/input/MouseEventManager.h"
 
 #include "core/clipboard/DataObject.h"
 #include "core/clipboard/DataTransfer.h"
 #include "core/dom/Element.h"
 #include "core/dom/ElementTraversal.h"
@@ skipping 414 matching lines @@
 
   if (Page* page = m_frame->page()) {
     // If focus shift is blocked, we eat the event. Note we should never
     // clear swallowEvent if the page already set it (e.g., by canceling
     // default behavior).
     if (element) {
       if (slideFocusOnShadowHostIfNecessary(*element))
         return WebInputEventResult::HandledSystem;
       if (!page->focusController().setFocusedElement(
               element, m_frame,
-              FocusParams(SelectionBehaviorOnFocus::None, WebFocusTypeMouse,
+              FocusParams(SelectionBehaviorOnFocus::Restore, WebFocusTypeMouse,
                           sourceCapabilities)))
         return WebInputEventResult::HandledSystem;
     } else {
       // We call setFocusedElement even with !element in order to blur
       // current focus element when a link is clicked; this is expected by
       // some sites that rely on onChange handlers running from form
       // fields before the button click is processed.
       if (!page->focusController().setFocusedElement(
               nullptr, m_frame,
-              FocusParams(SelectionBehaviorOnFocus::None, WebFocusTypeNone,
+              FocusParams(SelectionBehaviorOnFocus::Restore, WebFocusTypeNone,
                           sourceCapabilities)))
         return WebInputEventResult::HandledSystem;
     }
   }
 
   return WebInputEventResult::NotHandled;
 }
 
 bool MouseEventManager::slideFocusOnShadowHostIfNecessary(
     const Element& element) {
@@ skipping 540 matching lines @@
 
 void MouseEventManager::setClickCount(int clickCount) {
   m_clickCount = clickCount;
 }
 
 bool MouseEventManager::mouseDownMayStartDrag() {
   return m_mouseDownMayStartDrag;
 }
 
 }  // namespace blink