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.h

@@ -195,6 +195,7 @@ public:
     return popuphost_->view_handle();
   }
   gfx::NativeView UIT_GetMainWndHandle();
+  void UIT_ClearMainWndHandle();
 
   BrowserNavigationController* UIT_GetNavigationController() {
     REQUIRE_UIT();