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

include/gpu/gl/SkGLContext.h

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkGLContext_DEFINED
 #define SkGLContext_DEFINED
 
@@ skipping 113 matching lines @@
  * context with which to share display lists. This should be a pointer to an SkGLContext created
  * with SkCreatePlatformGLContext.  NULL indicates that no sharing is to take place. Returns a valid
  * gl context object or NULL if such can not be created.
  * Note: If Skia embedder needs a custom GL context that sets up the GL interface, this function
  * should be implemented by the embedder. Otherwise, the default implementation for the platform
  * should be compiled in the library.
  */
 SK_API SkGLContext* SkCreatePlatformGLContext(GrGLStandard forcedGpuAPI,
                                               SkGLContext* shareContext = nullptr);
 
+/** Destroys any GL related thread global state that may have been created due
+ *  to calls to SkCreatePlatformGLContext.
+ */
+SK_API void SkReleasePlatformGLAPIsInThread();
+
 /**
  * Helper macros for using the GL context through the GrGLInterface. Example:
  * SK_GL(glCtx, GenTextures(1, &texID));
  */
 #define SK_GL(ctx, X) (ctx).gl()->fFunctions.f ## X;    \
                       SkASSERT(0 == (ctx).gl()->fFunctions.fGetError())
 #define SK_GL_RET(ctx, RET, X) (RET) = (ctx).gl()->fFunctions.f ## X;    \
                   SkASSERT(0 == (ctx).gl()->fFunctions.fGetError())
 #define SK_GL_NOERRCHECK(ctx, X) (ctx).gl()->fFunctions.f ## X
 #define SK_GL_RET_NOERRCHECK(ctx, RET, X) (RET) = (ctx).gl()->fFunctions.f ## X
 
 #endif