Don't dispatch blur/focus events if the element's page is not focused.

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 1209 matching lines @@
     WebView* webView = m_webViewHelper.initializeAndLoad(m_baseURL + "domfocusout_domfocusin_events.html", true, 0);
 
     webView->setFocus(true);
     webView->setFocus(false);
     webView->setFocus(true);
 
     WebElement element = webView->mainFrame()->document().getElementById("message");
     EXPECT_STREQ("DOMFocusOutDOMFocusIn", element.innerText().utf8().data());
 }
 
+TEST_F(WebViewTest, DispatchesFocusBlurOnViewToggle)
+{
+    URLTestHelpers::registerMockedURLFromBaseURL(WebString::fromUTF8(m_baseURL.c_str()), "focus_blur_events.html");
+    WebView* webView = m_webViewHelper.initializeAndLoad(m_baseURL + "focus_blur_events.html", true, 0);
+
+    webView->setFocus(true);
+    webView->setFocus(false);
+    webView->setFocus(true);
+
+    WebElement element = webView->mainFrame()->document().getElementById("message");
+    // Expect not to see duplication of events.
+    EXPECT_STREQ("blurfocus", element.innerText().utf8().data());
 }
+
+}