Clean up EGL thread state at thread exit in nanobench and DM

src/gpu/gl/win/SkCreatePlatformGLContext_win.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gl/SkGLContext.h"
 
@@ skipping 182 matching lines @@
         return nullptr;
     }
     WinGLContext* ctx = new WinGLContext(forcedGpuAPI);
     if (!ctx->isValid()) {
         delete ctx;
         return nullptr;
     }
     return ctx;
 }
 
+void SkReleasePlatformGLAPIsInThread() {
+}