Merge revision 448 and 453 changes:

- Add support for running unit tests without multi-threaded message loop mode (issue #338).
- Mac: Fix unit test expectations.
- Mac: cef_time_t.day_of_week is not supported.
- Mac: Add support for building the 'Run cef_unittests' target from the command line.


git-svn-id: https://chromiumembedded.googlecode.com/svn/branches/963@455 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/browser_impl_gtk.cc

@@ -48,6 +48,11 @@ gfx::NativeView CefBrowserImpl::UIT_GetMainWndHandle() {
   return window_info_.m_Widget;
 }
 
+void CefBrowserImpl::UIT_ClearMainWndHandle() {
+  REQUIRE_UIT();
+  window_info_.m_Widget = NULL;
+}
+
 bool CefBrowserImpl::UIT_CreateBrowser(const CefString& url)
 {
   REQUIRE_UIT();