Use invalidation sets for :hover, :active, and :focus.

Source/core/css/HoverUpdateTest.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 "HTMLNames.h"
-#include "core/dom/Element.h"
-#include "core/dom/ElementTraversal.h"
-#include "core/frame/FrameView.h"
-#include "core/frame/LocalFrame.h"
-#include "core/html/HTMLDocument.h"
-#include "core/html/HTMLElement.h"
-#include "core/page/EventHandler.h"
-#include "core/testing/DummyPageHolder.h"
-#include "platform/PlatformMouseEvent.h"
-#include <gtest/gtest.h>
-
-using namespace WebCore;
-
-namespace {
-
-TEST(HoverUpdateTest, AffectedByHoverUpdate)
-{
-    // Check that when hovering the div in the document below, you only get a
-    // single element 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:hover { background-color: green }</style>"
-        "<div>"
-        "<span></span>"
-        "<span></span>"
-        "<span></span>"
-        "<span></span>"
-        "</div>", ASSERT_NO_EXCEPTION);
-
-    document->view()->updateLayoutAndStyleIfNeededRecursive();
-    unsigned startCount = document->styleEngine()->resolverAccessCount();
-
-    PlatformMouseEvent moveEvent(IntPoint(20, 20), IntPoint(20, 20), NoButton, PlatformEvent::MouseMoved, 0, false, false, false, false, currentTime());
-    document->frame()->eventHandler().handleMouseMoveEvent(moveEvent);
-    document->view()->updateLayoutAndStyleIfNeededRecursive();
-
-    unsigned accessCount = document->styleEngine()->resolverAccessCount() - startCount;
-
-    ASSERT_EQ(1U, accessCount);
-}
-
-} // namespace