Make SkGraphics::Term a no-op, stop calling it.

tools/VisualBench/VisualBench.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 "VisualBench.h"
 
@@ skipping 96 matching lines @@
 }
 
 // Externally declared entry points
 void application_init() {
     SkGraphics::Init();
     SkEvent::Init();
 }
 
 void application_term() {
     SkEvent::Term();
-    SkGraphics::Term();
 }
 
 SkOSWindow* create_sk_window(void* hwnd, int argc, char** argv) {
     return new VisualBench(hwnd, argc, argv);
 }