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

src/gpu/GrContextFactory.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrContextFactory_DEFINED
 #define GrContextFactory_DEFINED
 
@@ skipping 112 matching lines @@
                                GLContextOptions options = kNone_GLContextOptions);
     /**
      * Get a GrContext initialized with a type of GL context. It also makes the GL context current.
      */
     GrContext* get(GLContextType type,
                    GLContextOptions options = kNone_GLContextOptions) {
         return this->getContextInfo(type, options).fGrContext;
     }
     const GrContextOptions& getGlobalOptions() const { return fGlobalOptions; }
 
+    static void ReleaseGpuAPIsInThread();
 private:
     struct Context {
         GLContextType fType;
         GLContextOptions fOptions;
         SkGLContext*  fGLContext;
         GrContext*    fGrContext;
     };
     SkTArray<Context, true> fContexts;
     const GrContextOptions  fGlobalOptions;
 };
 
 #endif