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

platform_tools/android/apps/visualbench/src/main/jni/SkOSWindow_AndroidNative.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkOSWindow_Android.h"
 
 #include <GLES/gl.h>
@@ skipping 170 matching lines @@
         eglSwapInterval(fWindow.fDisplay, swapInterval);
     }
 }
 
 void SkOSWindow::onSetTitle(const char title[]) {
 }
 
 void SkOSWindow::onHandleInval(const SkIRect& rect) {
 }
 
-void SkOSWindow::onPDFSaved(const char title[], const char desc[], const char path[]) {
-}
-
 ///////////////////////////////////////////
 /////////////// SkEvent impl //////////////
 ///////////////////////////////////////////
 
 void SkEvent::SignalQueueTimer(SkMSec ms) {
 }
 
 void SkEvent::SignalNonEmptyQueue() {
 }