Invert the owning relationship between WebFrame and Frame.

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 3173 matching lines @@
     webViewHelper.webView()->resize(WebSize(640, 480));
     webViewHelper.webView()->layout();
     runPendingTasks();
 
     static const char* kFindString = "result";
     static const int kFindIdentifier = 12345;
 
     WebFindOptions options;
     WebString searchText = WebString::fromUTF8(kFindString);
     WebFrameImpl* mainFrame = toWebFrameImpl(webViewHelper.webView()->mainFrame());
-    WebFrameImpl* secondFrame = toWebFrameImpl(mainFrame->traverseNext(false));
+    RefPtr<WebFrameImpl> secondFrame = toWebFrameImpl(mainFrame->traverseNext(false));
     RefPtr<WebCore::Frame> holdSecondFrame = secondFrame->frame();
 
     // Detach the frame before finding.
     EXPECT_TRUE(mainFrame->document().getElementById("frame").remove());
 
     EXPECT_TRUE(mainFrame->find(kFindIdentifier, searchText, options, false, 0));
     EXPECT_FALSE(secondFrame->find(kFindIdentifier, searchText, options, false, 0));
 
     runPendingTasks();
     EXPECT_FALSE(client.findResultsAreReady());
@@ skipping 1678 matching lines @@
 
     // Call javascript to make the layer scrollable, and verify it.
     WebFrameImpl* frame = (WebFrameImpl*)webViewHelper.webView()->mainFrame();
     frame->executeScript(WebScriptSource("allowScroll();"));
     webViewHelper.webView()->layout();
     ASSERT_TRUE(webScrollLayer->userScrollableHorizontal());
     ASSERT_TRUE(webScrollLayer->userScrollableVertical());
 }
 
 } // namespace