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

src/gpu/gl/mesa/SkMesaGLContext.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/osmesa.h>
 
@@ skipping 81 matching lines @@
             SkDebugf("Could not make MESA context current.");
         }
     }
 }
 
 void SkMesaGLContext::onPlatformSwapBuffers() const { }
 
 GrGLFuncPtr SkMesaGLContext::onPlatformGetProcAddress(const char* procName) const {
     return OSMesaGetProcAddress(procName);
 }
+
+void SkMesaGLContext::ReleaseGpuAPIsInThread() {
+}