Add new FrameTest.* unit tests and fix discovered CefFrame-related bugs.

- Allow empty |name| argument to CefBrowser::GetFrame. This will return the main frame.
- Modify CefBrowser::GetFrame to search both assigned and unique frame names.
- Calling CefFrame::IsFocused on the main frame should return true when there are no other frames.
- Fix CefBrowser::GetFrameIdentifiers and GetFrameNames to return correct values in the renderer process (issue #1236).
- Delete NavigationTest.FrameNameIdent which is now obsoleted by the new FrameTests.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1842 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef_dll/cpptoc/browser_cpptoc.cc

@@ -247,10 +247,7 @@ struct _cef_frame_t* CEF_CALLBACK browser_get_frame(struct _cef_browser_t* self,
   DCHECK(self);
   if (!self)
     return NULL;
-  // Verify param: name; type: string_byref_const
-  DCHECK(name);
-  if (!name)
-    return NULL;
+  // Unverified params: name
 
   // Execute
   CefRefPtr<CefFrame> _retval = CefBrowserCppToC::Get(self)->GetFrame(