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

include/views/SkOSWindow_iOS.h

Index: include/views/SkOSWindow_iOS.h
diff --git a/include/views/SkOSWindow_iOS.h b/include/views/SkOSWindow_iOS.h
index f386c738f9e3d37f5c511c96cc7feb2790efffd5..071d6db18cf66bc233c763bf04498b9375bdf462 100644
--- a/include/views/SkOSWindow_iOS.h
+++ b/include/views/SkOSWindow_iOS.h
@@ -25,6 +25,10 @@ public:
     bool    attach(SkBackEndTypes attachType, int msaaSampleCount, AttachmentInfo*);
     void    present();
 
+    bool makeFullscreen() { return true; }
+    void closeWindow() { /* Not impl yet */ }
+    void setVsync(bool) { /* Can't turn off vsync? */ }
+
 protected:
     // overrides from SkEventSink
     virtual bool onEvent(const SkEvent& evt);