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

include/views/SkOSWindow_Android.h

 /*
  * Copyright 2011 Skia
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkOSWindow_Android_DEFINED
 #define SkOSWindow_Android_DEFINED
 
@@ skipping 13 matching lines @@
     ~SkOSWindow();
 
     enum SkBackEndTypes {
         kNone_BackEndType,
         kNativeGL_BackEndType,
     };
 
     bool attach(SkBackEndTypes attachType, int msaaSampleCount, AttachmentInfo* info);
     void detach();
     void present();
-    void closeWindow() override;
-    void setVsync(bool) override;
+    bool makeFullscreen() { return true; }
+    void closeWindow();
+    void setVsync(bool);
     bool destroyRequested() { return fDestroyRequested; }
 
     virtual void onPDFSaved(const char title[], const char desc[], const char path[]);
 
 protected:
     // overrides from SkWindow
     virtual void onHandleInval(const SkIRect&);
     virtual void onSetTitle(const char title[]);
 
 private:
     SkAndroidWindow fWindow;
     ANativeWindow* fNativeWindow;
     bool fDestroyRequested;
 
     typedef SkWindow INHERITED;
 };
 
 #endif