Remove WebFrame::findChildByExpression.

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 3030 matching lines @@
     const int length = 5;
     text = frame->contentAsText(length);
     EXPECT_EQ(expected.substr(0, length), text.utf8());
 
     // Now do a new test with a subframe.
     const char outerFrameSource[] = "Hello<iframe></iframe> world";
     frame->loadHTMLString(outerFrameSource, testURL);
     runPendingTasks();
 
     // Load something into the subframe.
-    WebFrame* subframe = frame->findChildByExpression(WebString::fromUTF8("/html/body/iframe"));
+    WebFrame* subframe = frame->firstChild();
     ASSERT_TRUE(subframe);
     subframe->loadHTMLString("sub<p>text", testURL);
     runPendingTasks();
 
     text = frame->contentAsText(std::numeric_limits<size_t>::max());
     EXPECT_EQ("Hello world\n\nsub\ntext", text.utf8());
 
     // Get the frame text where the subframe separator falls on the boundary of
     // what we'll take. There used to be a crash in this case.
     text = frame->contentAsText(12);
@@ skipping 469 matching lines @@
     WebFrame* frame;
     WebRect startWebRect;
     WebRect endWebRect;
 
     registerMockedHttpURLLoad("select_range_iframe.html");
     registerMockedHttpURLLoad("select_range_basic.html");
 
     FrameTestHelpers::WebViewHelper webViewHelper;
     initializeTextSelectionWebView(m_baseURL + "select_range_iframe.html", &webViewHelper);
     frame = webViewHelper.webView()->mainFrame();
-    WebFrame* subframe = frame->findChildByExpression(WebString::fromUTF8("/html/body/iframe"));
+    WebFrame* subframe = frame->firstChild();
     EXPECT_EQ("Some test text for testing.", selectionAsString(subframe));
     webViewHelper.webView()->selectionBounds(startWebRect, endWebRect);
     subframe->executeCommand(WebString::fromUTF8("Unselect"));
     EXPECT_EQ("", selectionAsString(subframe));
     subframe->selectRange(topLeft(startWebRect), bottomRightMinusOne(endWebRect));
     EXPECT_EQ("Some test text for testing.", selectionAsString(subframe));
 }
 
 TEST_F(WebFrameTest, SelectRangeDivContentEditable)
 {
@@ skipping 1837 matching lines @@
     EXPECT_EQ(2U, container->percentHeightDescendants()->size());
     EXPECT_TRUE(container->percentHeightDescendants()->contains(percentHeightInAnonymous));
     EXPECT_TRUE(container->percentHeightDescendants()->contains(percentHeightDirectChild));
 
     WebCore::RenderBlock* anonymousBlock = percentHeightInAnonymous->containingBlock();
     EXPECT_TRUE(anonymousBlock->isAnonymous());
     EXPECT_FALSE(anonymousBlock->hasPercentHeightDescendants());
 }
 
 } // namespace