Fix selectionEnd value in a case of dragging out from an INPUT element.

third_party/WebKit/Source/core/html/HTMLTextFormControlElementTest.cpp

 // Copyright 2014 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/html/HTMLTextFormControlElement.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/Text.h"
 #include "core/editing/FrameSelection.h"
 #include "core/editing/Position.h"
@@ skipping 197 matching lines @@
     document().frame()->selection().setSelection(newSelection, FrameSelection::CloseTyping | FrameSelection::ClearTypingStyle | FrameSelection::DoNotUpdateAppearance);
     ASSERT_EQ(3, input->selectionStart());
 
     Persistent<SpellChecker> spellChecker(SpellChecker::create(page().frame()));
     forceLayoutFlag();
     int startCount = layoutCount();
     spellChecker->respondToChangedSelection(oldSelection, FrameSelection::CloseTyping | FrameSelection::ClearTypingStyle);
     EXPECT_EQ(startCount, layoutCount());
 }
 
+TEST_F(HTMLTextFormControlElementTest, IndexForPosition)
+{
+    HTMLInputElement* input = toHTMLInputElement(document().getElementById("input"));
+    input->setValue("Hello");
+    HTMLElement* innerEditor = input->innerEditorElement();
+    EXPECT_EQ(5, HTMLTextFormControlElement::indexForPosition(innerEditor, Position(innerEditor, PositionAnchorType::AfterAnchor)));
+}
+
 } // namespace blink