Remove usage of WebElement::tagName() in blink.

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 3583 matching lines @@
     EXPECT_TRUE(frame->document().focusedElement().isNull());
 
     // Find in an <input> value.
     EXPECT_TRUE(frame->find(findIdentifier, WebString::fromUTF8("bar2"), options, false, 0));
     // Confirm stopFinding(false) sets the selection on the found text.
     frame->stopFinding(false);
     range = frame->selectionRange();
     ASSERT_FALSE(range.isNull());
     EXPECT_EQ(5, range.startOffset());
     EXPECT_EQ(9, range.endOffset());
-    EXPECT_EQ(WebString::fromUTF8("INPUT"), frame->document().focusedElement().tagName());
+    EXPECT_TRUE(frame->document().focusedElement().hasHTMLTagName("input"));
 
     // Find in a <textarea> content.
     EXPECT_TRUE(frame->find(findIdentifier, WebString::fromUTF8("bar3"), options, false, 0));
     // Confirm stopFinding(false) sets the selection on the found text.
     frame->stopFinding(false);
     range = frame->selectionRange();
     ASSERT_FALSE(range.isNull());
     EXPECT_EQ(5, range.startOffset());
     EXPECT_EQ(9, range.endOffset());
-    EXPECT_EQ(WebString::fromUTF8("TEXTAREA"), frame->document().focusedElement().tagName());
+    EXPECT_TRUE(frame->document().focusedElement().hasHTMLTagName("textarea"));
 
     // Find in a contentEditable element.
     EXPECT_TRUE(frame->find(findIdentifier, WebString::fromUTF8("bar4"), options, false, 0));
     // Confirm stopFinding(false) sets the selection on the found text.
     frame->stopFinding(false);
     range = frame->selectionRange();
     ASSERT_FALSE(range.isNull());
     EXPECT_EQ(0, range.startOffset());
     EXPECT_EQ(4, range.endOffset());
     // "bar4" is surrounded by <span>, but the focusable node should be the parent <div>.
-    EXPECT_EQ(WebString::fromUTF8("DIV"), frame->document().focusedElement().tagName());
+    EXPECT_TRUE(frame->document().focusedElement().hasHTMLTagName("div"));
 
     // Find in <select> content.
     EXPECT_FALSE(frame->find(findIdentifier, WebString::fromUTF8("bar5"), options, false, 0));
     // If there are any matches, stopFinding will set the selection on the found text.
     // However, we do not expect any matches, so check that the selection is null.
     frame->stopFinding(false);
     range = frame->selectionRange();
     ASSERT_TRUE(range.isNull());
 }
 
@@ skipping 4566 matching lines @@
 
 TEST_F(WebFrameTest, MaxFramesDetach)
 {
     registerMockedHttpURLLoad("max-frames-detach.html");
     FrameTestHelpers::WebViewHelper webViewHelper;
     WebViewImpl* webViewImpl = webViewHelper.initializeAndLoad(m_baseURL + "max-frames-detach.html", true);
     webViewImpl->mainFrameImpl()->collectGarbage();
 }
 
 } // namespace blink