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

Source/web/tests/WebViewTest.cpp

Index: Source/web/tests/WebViewTest.cpp
diff --git a/Source/web/tests/WebViewTest.cpp b/Source/web/tests/WebViewTest.cpp
index 5e6169a87cc858d442d3f49ae791a1d2665ebcb5..f300d0f3f64726f2943e68da8a1fa7f6f2c71db8 100644
--- a/Source/web/tests/WebViewTest.cpp
+++ b/Source/web/tests/WebViewTest.cpp
@@ -1227,4 +1227,18 @@ TEST_F(WebViewTest, DispatchesDomFocusOutDomFocusInOnViewToggleFocus)
     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());
+}
+
 }