Rename childrenAffectedBy methods and constants.

Source/core/css/DragUpdateTest.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 "config.h"
 #include "core/dom/Element.h"
 #include "core/frame/FrameView.h"
 #include "core/html/HTMLDocument.h"
 #include "core/html/HTMLElement.h"
 #include "core/testing/DummyPageHolder.h"
@@ skipping 22 matching lines @@
     unsigned startCount = document->styleEngine()->resolverAccessCount();
 
     document->documentElement()->renderer()->updateDragState(true);
     document->view()->updateLayoutAndStyleIfNeededRecursive();
 
     unsigned accessCount = document->styleEngine()->resolverAccessCount() - startCount;
 
     ASSERT_EQ(1U, accessCount);
 }
 
-TEST(DragUpdateTest, ChildrenAffectedByDragUpdate)
+TEST(DragUpdateTest, ChildrenOrSiblingsAffectedByDragUpdate)
 {
     // Check that when dragging the div in the document below, you get a
     // full subtree style recalc.
 
     OwnPtr<DummyPageHolder> dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
     HTMLDocument* document = toHTMLDocument(&dummyPageHolder->document());
     document->documentElement()->setInnerHTML("<style>div {width:100px;height:100px} div:-webkit-drag span { background-color: green }</style>"
         "<div>"
         "<span></span>"
         "<span></span>"
         "<span></span>"
         "<span></span>"
         "</div>", ASSERT_NO_EXCEPTION);
 
     document->updateLayout();
     unsigned startCount = document->styleEngine()->resolverAccessCount();
 
     document->documentElement()->renderer()->updateDragState(true);
     document->updateLayout();
 
     unsigned accessCount = document->styleEngine()->resolverAccessCount() - startCount;
 
     ASSERT_EQ(5U, accessCount);
 }
 
 } // namespace