Update css styles after modifying display mode

Source/web/tests/WebViewTest.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2071 matching lines @@
 };
 
 WebFrame* CreateChildCounterFrameClient::createChildFrame(WebLocalFrame* parent, WebTreeScopeType scope, const WebString& frameName, WebSandboxFlags sandboxFlags)
 {
     ++m_count;
     return TestWebFrameClient::createChildFrame(parent, scope, frameName, sandboxFlags);
 }
 
 TEST_F(WebViewTest, ChangeDisplayMode)
 {
-    WebView* webView = m_webViewHelper.initializeAndLoad("about:blank", true);
+    URLTestHelpers::registerMockedURLFromBaseURL(WebString::fromUTF8(m_baseURL.c_str()), WebString::fromUTF8("display_mode.html"));
+    WebView* webView = m_webViewHelper.initializeAndLoad(m_baseURL + "display_mode.html", true);
 
-    WebScriptSource source("document.querySelector('body').innerHTML = window.matchMedia('(display-mode: minimal-ui)').matches");
-
-    webView->mainFrame()->executeScript(source);
-    std::string content = webView->mainFrame()->contentAsText(5).utf8();
-    EXPECT_EQ("false", content);
+    std::string content = webView->mainFrame()->contentAsText(21).utf8();
+    EXPECT_EQ("regular-ui", content);
 
     webView->setDisplayMode(WebDisplayModeMinimalUi);
-    webView->mainFrame()->executeScript(source);
-    content = webView->mainFrame()->contentAsText(5).utf8();
-    EXPECT_EQ("true", content);
+    content = webView->mainFrame()->contentAsText(21).utf8();
+    EXPECT_EQ("minimal-ui", content);
+    m_webViewHelper.reset();
 }
 
 TEST_F(WebViewTest, AddFrameInCloseUnload)
 {
     CreateChildCounterFrameClient frameClient;
     URLTestHelpers::registerMockedURLFromBaseURL(WebString::fromUTF8(m_baseURL.c_str()), WebString::fromUTF8("add_frame_in_unload.html"));
     m_webViewHelper.initializeAndLoad(m_baseURL + "add_frame_in_unload.html", true, &frameClient);
     m_webViewHelper.reset();
     EXPECT_EQ(0, frameClient.count());
 }
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         webViewImpl->advanceFocusInForm(WebFocusTypeBackward);
     }
     // Now focus will stay on previous focus itself, because it has no previous
     // element.
     EXPECT_EQ(currentFocus, document->focusedElement());
 
     m_webViewHelper.reset();
 }
 
 } // namespace blink