Replace LayoutTests/paint/invalidation/text-selection-focus.html with a SimTest.

third_party/WebKit/Source/web/tests/sim/SimTest.cpp

 // Copyright 2015 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 "web/tests/sim/SimTest.h"
 
 #include "core/dom/Document.h"
+#include "core/frame/LocalDOMWindow.h"
 #include "platform/LayoutTestSupport.h"
 #include "platform/scroll/ScrollbarTheme.h"
 #include "platform/testing/UnitTestHelpers.h"
 #include "public/web/WebCache.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/WebViewImpl.h"
 
 namespace blink {
 
 SimTest::SimTest() : m_webViewClient(m_compositor) {
   Document::setThreadedParsingEnabledForTesting(false);
   // Use the mock theme to get more predictable code paths, this also avoids
   // the OS callbacks in ScrollAnimatorMac which can schedule frames
   // unpredictably since the OS will randomly call into blink for
   // updateScrollerStyleForNewRecommendedScrollerStyle which then does
   // FrameView::scrollbarStyleChanged and will adjust the scrollbar existence
   // in the middle of a test.
   LayoutTestSupport::setMockThemeEnabledForTest(true);
   ScrollbarTheme::setMockScrollbarsEnabled(true);
   m_webViewHelper.initialize(true, nullptr, &m_webViewClient);
   m_compositor.setWebViewImpl(webView());
+  m_page.setPage(webView().page());
 }
 
 SimTest::~SimTest() {
   // Pump the message loop to process the load event.
   testing::runPendingTasks();
 
   Document::setThreadedParsingEnabledForTesting(true);
   LayoutTestSupport::setMockThemeEnabledForTest(false);
   ScrollbarTheme::setMockScrollbarsEnabled(false);
   WebCache::clear();
 }
 
 void SimTest::loadURL(const String& url) {
   WebURLRequest request(KURL(ParsedURLString, url));
   webView().mainFrameImpl()->loadRequest(request);
 }
 
+LocalDOMWindow& SimTest::window() {

[ojan, 2016/11/22 00:46:27]

This really makes me want a WebModules thing or something so that we could
expose just the web-exposed APIs instead of the whole internal API. Not worth
blocking this patch obviously.

+  return *document().domWindow();
+}
+
+SimPage& SimTest::page() {
+  return m_page;
+}
+
 Document& SimTest::document() {
   return *webView().mainFrameImpl()->frame()->document();
 }
 
 WebViewImpl& SimTest::webView() {
   return *m_webViewHelper.webView();
 }
 
 const SimWebViewClient& SimTest::webViewClient() const {
   return m_webViewClient;
 }
 
 SimCompositor& SimTest::compositor() {
   return m_compositor;
 }
 
 }  // namespace blink