Main frame should remain scrollable if the fullscreen element is the document

Source/web/tests/WebFrameTest.cpp

 /*
  * Copyright (C) 2010 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 5334 matching lines @@
 
     // Verify that the main frame is scrollable upon exiting fullscreen.
     webViewImpl->willExitFullScreen();
     webViewImpl->didExitFullScreen();
     webViewImpl->layout();
     ASSERT_FALSE(WebCore::FullscreenElementStack::isFullScreen(*document));
     webScrollLayer = webViewImpl->compositor()->scrollLayer()->platformLayer();
     ASSERT_TRUE(webScrollLayer->scrollable());
 }
 
+TEST_F(WebFrameTest, FullscreenMainFrameScrollable)
+{
+    FakeCompositingWebViewClient client;
+    registerMockedHttpURLLoad("fullscreen_div.html");
+    FrameTestHelpers::WebViewHelper webViewHelper;
+    int viewportWidth = 640;
+    int viewportHeight = 480;
+    WebViewImpl* webViewImpl = webViewHelper.initializeAndLoad(m_baseURL + "fullscreen_div.html", true, 0, &client, &configueCompositingWebView);
+    webViewImpl->resize(WebSize(viewportWidth, viewportHeight));
+    webViewImpl->layout();
+
+    Document* document = toWebLocalFrameImpl(webViewImpl->mainFrame())->frame()->document();
+    WebCore::UserGestureIndicator gesture(WebCore::DefinitelyProcessingUserGesture);
+    document->documentElement()->webkitRequestFullscreen();
+    webViewImpl->willEnterFullScreen();
+    webViewImpl->didEnterFullScreen();
+    webViewImpl->layout();
+
+    // Verify that the main frame is still scrollable.
+    ASSERT_TRUE(WebCore::FullscreenElementStack::isFullScreen(*document));
+    WebLayer* webScrollLayer = webViewImpl->compositor()->scrollLayer()->platformLayer();
+    ASSERT_TRUE(webScrollLayer->scrollable());
+}
+
 TEST_F(WebFrameTest, RenderBlockPercentHeightDescendants)
 {
     registerMockedHttpURLLoad("percent-height-descendants.html");
     FrameTestHelpers::WebViewHelper webViewHelper;
     webViewHelper.initializeAndLoad(m_baseURL + "percent-height-descendants.html");
 
     WebView* webView = webViewHelper.webView();
     webView->resize(WebSize(800, 800));
     webView->layout();
 
@@ skipping 55 matching lines @@
     registerMockedHttpURLLoad("link-manifest-change.html");
 
     ManifestChangeWebFrameClient webFrameClient;
     FrameTestHelpers::WebViewHelper webViewHelper;
     webViewHelper.initializeAndLoad(m_baseURL + "link-manifest-change.html", true, &webFrameClient);
 
     EXPECT_EQ(14, webFrameClient.manifestChangeCount());
 }
 
 } // namespace