Make async waiter explicit MojoGLES2CreateContext param

mojo/public/gles2/gles2_private.h

Index: mojo/public/gles2/gles2_private.h
diff --git a/mojo/public/gles2/gles2_private.h b/mojo/public/gles2/gles2_private.h
index 0854f6fc55c70a9726f0b0040daaf0b70f0a9f95..45f0b03f94ae662135f96b4f191f15f6cc01cd1f 100644
--- a/mojo/public/gles2/gles2_private.h
+++ b/mojo/public/gles2/gles2_private.h
@@ -24,12 +24,11 @@ class MOJO_GLES2_EXPORT GLES2Support {
 
   static void Init(GLES2Support* gles2_support);
 
-  virtual void Initialize(const MojoAsyncWaiter* async_waiter) = 0;
-  virtual void Terminate() = 0;
   virtual MojoGLES2Context CreateContext(
       MessagePipeHandle handle,
       MojoGLES2ContextLost lost_callback,
-      void* closure) = 0;
+      void* closure,
+      const MojoAsyncWaiter* async_waiter) = 0;
   virtual void DestroyContext(MojoGLES2Context context) = 0;
   virtual void MakeCurrent(MojoGLES2Context context) = 0;
   virtual void SwapBuffers() = 0;