SampleApp: remove SkWindow::onPDFSaved, it does not work

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 18 matching lines @@
     };
 
     bool attach(SkBackEndTypes attachType, int msaaSampleCount, AttachmentInfo* info);
     void detach();
     void present();
     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