Mac: Add off-screen rendering support (issue #518).

- Build with the 10.7 SDK (set GYP_DEFINES='mac_sdk=10.7') to include Retina support in the cefclient OSR example.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1226 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

tests/cefclient/client_handler.h

@@ -194,6 +194,8 @@ class ClientHandler : public CefClient,
                               int viewY,
                               int& screenX,
                               int& screenY) OVERRIDE;
+  virtual bool GetScreenInfo(CefRefPtr<CefBrowser> browser,
+                             CefScreenInfo& screen_info) OVERRIDE;
   virtual void OnPopupShow(CefRefPtr<CefBrowser> browser, bool show) OVERRIDE;
   virtual void OnPopupSize(CefRefPtr<CefBrowser> browser,
                            const CefRect& rect) OVERRIDE;