Double-clicking whitespace after value text should select the last word in INPUT/TEXTAREA.

third_party/WebKit/Source/core/layout/LayoutTextControl.cpp

 /**
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  *           (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 33 matching lines @@
 HTMLTextFormControlElement* LayoutTextControl::textFormControlElement() const
 {
     return toHTMLTextFormControlElement(node());
 }
 
 HTMLElement* LayoutTextControl::innerEditorElement() const
 {
     return textFormControlElement()->innerEditorElement();
 }
 
-void LayoutTextControl::addChild(LayoutObject* newChild, LayoutObject* beforeChild)
-{
-    // FIXME: This is a terrible hack to get the caret over the placeholder text since it'll
-    // make us paint the placeholder first. (See https://trac.webkit.org/changeset/118733)
-    Node* node = newChild->node();
-    if (node && node->isElementNode() && toElement(node)->shadowPseudoId() == "-webkit-input-placeholder")
-        LayoutBlockFlow::addChild(newChild, firstChild());
-    else
-        LayoutBlockFlow::addChild(newChild, beforeChild);
-}
-
 void LayoutTextControl::styleDidChange(StyleDifference diff, const ComputedStyle* oldStyle)
 {
     LayoutBlockFlow::styleDidChange(diff, oldStyle);
     Element* innerEditor = innerEditorElement();
     if (!innerEditor)
         return;
     LayoutBlock* innerEditorLayoutObject = toLayoutBlock(innerEditor->layoutObject());
     if (innerEditorLayoutObject) {
         // We may have set the width and the height in the old style in layout().
         // Reset them now to avoid getting a spurious layout hint.
@@ skipping 216 matching lines @@
     HTMLElement* placeholder = toHTMLTextFormControlElement(node())->placeholderElement();
     LayoutObject* placeholderLayoutObject = placeholder ? placeholder->layoutObject() : nullptr;
     if (!placeholderLayoutObject)
         return nullptr;
     if (relayoutChildren)
         layoutScope.setChildNeedsLayout(placeholderLayoutObject);
     return placeholderLayoutObject;
 }
 
 } // namespace blink