Fix crash with fullscreen elements inside frames.

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 6131 matching lines @@
     EXPECT_EQ(viewportWidth, fullscreenRenderer->logicalWidth().toInt());
     EXPECT_EQ(viewportHeight, fullscreenRenderer->logicalHeight().toInt());
 
     // Verify it's updated after a device rotation.
     client.m_screenInfo.rect.width = viewportHeight;
     client.m_screenInfo.rect.height = viewportWidth;
     webViewImpl->resize(WebSize(viewportHeight, viewportWidth));
     webViewImpl->layout();
     EXPECT_EQ(viewportHeight, fullscreenRenderer->logicalWidth().toInt());
     EXPECT_EQ(viewportWidth, fullscreenRenderer->logicalHeight().toInt());
-
 }
 
 TEST_F(WebFrameTest, FullscreenLayerNonScrollable)
 {
     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, configurePinchVirtualViewport);
@@ skipping 40 matching lines @@
     webViewImpl->layout();
 
     // Verify that the main frame is still scrollable.
     ASSERT_TRUE(Fullscreen::isFullScreen(*document));
     WebLayer* webScrollLayer = webViewImpl->compositor()->scrollLayer()->platformLayer();
     ASSERT_TRUE(webScrollLayer->scrollable());
     ASSERT_TRUE(webScrollLayer->userScrollableHorizontal());
     ASSERT_TRUE(webScrollLayer->userScrollableVertical());
 }
 
+TEST_F(WebFrameTest, FullscreenSubframe)
+{
+    FakeCompositingWebViewClient client;
+    registerMockedHttpURLLoad("fullscreen_iframe.html");
+    registerMockedHttpURLLoad("fullscreen_div.html");
+    FrameTestHelpers::WebViewHelper webViewHelper;
+    WebViewImpl* webViewImpl = webViewHelper.initializeAndLoad(m_baseURL + "fullscreen_iframe.html", true, 0, &client, configurePinchVirtualViewport);
+    int viewportWidth = 640;
+    int viewportHeight = 480;
+    client.m_screenInfo.rect.width = viewportWidth;
+    client.m_screenInfo.rect.height = viewportHeight;
+    webViewImpl->resize(WebSize(viewportWidth, viewportHeight));
+    webViewImpl->layout();
+
+    Document* document = toWebLocalFrameImpl(webViewHelper.webView()->mainFrame()->firstChild())->frame()->document();
+    UserGestureIndicator gesture(DefinitelyProcessingUserGesture);
+    Element* divFullscreen = document->getElementById("div1");
+    Fullscreen::from(*document).requestFullscreen(*divFullscreen, Fullscreen::PrefixedRequest);
+    webViewImpl->didEnterFullScreen();
+    webViewImpl->layout();
+
+    // Verify that the element is sized to the viewport.
+    RenderFullScreen* fullscreenRenderer = Fullscreen::from(*document).fullScreenRenderer();
+    EXPECT_EQ(viewportWidth, fullscreenRenderer->logicalWidth().toInt());
+    EXPECT_EQ(viewportHeight, fullscreenRenderer->logicalHeight().toInt());
+
+    // Verify it's updated after a device rotation.
+    client.m_screenInfo.rect.width = viewportHeight;
+    client.m_screenInfo.rect.height = viewportWidth;
+    webViewImpl->resize(WebSize(viewportHeight, viewportWidth));
+    webViewImpl->layout();
+    EXPECT_EQ(viewportHeight, fullscreenRenderer->logicalWidth().toInt());
+    EXPECT_EQ(viewportWidth, fullscreenRenderer->logicalHeight().toInt());
+}
+
 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 540 matching lines @@
     EXPECT_EQ(1u, frameClient.navigationalDataReceivedCount());
 
     // Neither should a page reload.
     localFrame->reload();
     EXPECT_EQ(4u, frameClient.provisionalLoadCount());
     EXPECT_FALSE(frameClient.wasLastProvisionalLoadATransition());
     EXPECT_EQ(1u, frameClient.navigationalDataReceivedCount());
 }
 
 } // namespace