Remove logic to reset input method more than needed

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

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 193 matching lines @@
   if (closeTyping)
     TypingCommand::closeTyping(m_frame);
 
   if (shouldClearTypingStyle)
     m_frame->editor().clearTypingStyle();
 
   if (m_selectionEditor->visibleSelection<Strategy>() == s &&
       m_handleVisibility == handleVisibility) {
     // Even if selection was not changed, selection offsets may have been
     // changed.
-    m_frame->inputMethodController().cancelCompositionIfSelectionIsInvalid();
     notifyLayoutObjectOfSelectionChange(userTriggered);
     return;
   }
 
   const VisibleSelectionTemplate<Strategy> oldSelection =
       visibleSelection<Strategy>();
   const Position& oldSelectionStart = selection().start();
 
   m_handleVisibility = handleVisibility;
   m_selectionEditor->setVisibleSelection(s, options);
@@ skipping 26 matching lines @@
     // editing/selection/longpress-selection-in-iframe-removed-crash.html
     // reach here.
     return;
   }
   notifyLayoutObjectOfSelectionChange(userTriggered);
   // If the selections are same in the DOM tree but not in the flat tree,
   // don't fire events. For example, if the selection crosses shadow tree
   // boundary, selection for the DOM tree is shrunk while that for the
   // flat tree is not. Additionally, this case occurs in some edge cases.
   // See also: editing/pasteboard/4076267-3.html
-  if (oldSelection == m_selectionEditor->visibleSelection<Strategy>()) {
-    m_frame->inputMethodController().cancelCompositionIfSelectionIsInvalid();
+  if (oldSelection == m_selectionEditor->visibleSelection<Strategy>())
     return;
-  }
+
   m_frame->editor().respondToChangedSelection(oldSelectionStart, options);
   if (userTriggered == UserTriggered) {
     ScrollAlignment alignment;
 
     if (m_frame->editor().behavior().shouldCenterAlignWhenSelectionIsRevealed())
       alignment = (align == CursorAlignOnScroll::Always)
                       ? ScrollAlignment::alignCenterAlways
                       : ScrollAlignment::alignCenterIfNeeded;
     else
       alignment = (align == CursorAlignOnScroll::Always)
@@ skipping 1164 matching lines @@
 }
 
 void showTree(const blink::FrameSelection* sel) {
   if (sel)
     sel->showTreeForThis();
   else
     LOG(INFO) << "Cannot showTree for <null> FrameSelection.";
 }
 
 #endif