Move closeWindow()/setFullscreen()/setVSynv() from SkWindow to SkOSWindow

include/views/SkOSWindow_Mac.h

Index: include/views/SkOSWindow_Mac.h
diff --git a/include/views/SkOSWindow_Mac.h b/include/views/SkOSWindow_Mac.h
index 2a15bf5f67ad2f1141b0ca6b61b90d50a6ebcb80..91d42bd855580ab7928ad8f45c08512dd6984873 100644
--- a/include/views/SkOSWindow_Mac.h
+++ b/include/views/SkOSWindow_Mac.h
@@ -30,6 +30,10 @@ public:
     bool    attach(SkBackEndTypes attachType, int msaaSampleCount, AttachmentInfo*);
     void    present();
 
+    bool    makeFullscreen() { return false; }
+    void    closeWindow()  { /* Not impl yet */ }
+    void    setVsync(bool)  { /* Not impl yet */ }
+
 protected:
     // overrides from SkEventSink
     virtual bool onEvent(const SkEvent& evt);