Mojo bindings environment: remove usage in gles2.

mojo/public/c/gles2/gles2.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_PUBLIC_C_GLES2_GLES2_H_
 #define MOJO_PUBLIC_C_GLES2_GLES2_H_
 
 // Note: This header should be compilable as C.
 
 #include <GLES2/gl2.h>
 #include <stdint.h>
 
-#include "mojo/public/c/environment/async_waiter.h"
 #include "mojo/public/c/gles2/gles2_export.h"
 #include "mojo/public/c/gles2/gles2_types.h"
 #include "mojo/public/c/system/types.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 MOJO_GLES2_EXPORT MojoGLES2Context
-    MojoGLES2CreateContext(MojoHandle handle,
-                           const int32_t* attrib_list,
-                           MojoGLES2ContextLost lost_callback,
-                           void* closure,
-                           const MojoAsyncWaiter* async_waiter);
+MojoGLES2CreateContext(MojoHandle handle,
+                       const int32_t* attrib_list,
+                       MojoGLES2ContextLost lost_callback,
+                       void* closure);
 MOJO_GLES2_EXPORT void MojoGLES2DestroyContext(MojoGLES2Context context);
 MOJO_GLES2_EXPORT void MojoGLES2MakeCurrent(MojoGLES2Context context);
 MOJO_GLES2_EXPORT void MojoGLES2SwapBuffers(void);
 
 // TODO(piman): We shouldn't have to leak this interface, especially in a
 // type-unsafe way.
 MOJO_GLES2_EXPORT void* MojoGLES2GetGLES2Interface(MojoGLES2Context context);
 
 #define VISIT_GL_CALL(Function, ReturnType, PARAMETERS, ARGUMENTS) \
   MOJO_GLES2_EXPORT ReturnType GL_APIENTRY gl##Function PARAMETERS;
 #include "mojo/public/c/gles2/gles2_call_visitor_autogen.h"
 #undef VISIT_GL_CALL
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // MOJO_PUBLIC_C_GLES2_GLES2_H_