Make async waiter explicit MojoGLES2CreateContext param

mojo/gles2/gles2_support_impl.h

Index: mojo/gles2/gles2_support_impl.h
diff --git a/mojo/gles2/gles2_support_impl.h b/mojo/gles2/gles2_support_impl.h
index 5598a09a15f76d1eda5e4515e5cbff0fc191a3a1..b789e71e717d2d30606f77676b3c5d1e4ee05e49 100644
--- a/mojo/gles2/gles2_support_impl.h
+++ b/mojo/gles2/gles2_support_impl.h
@@ -18,12 +18,11 @@ class MOJO_GLES2_IMPL_EXPORT GLES2SupportImpl : public GLES2Support {
 
   static void Init();
 
-  virtual void Initialize(const MojoAsyncWaiter* async_waiter) OVERRIDE;
-  virtual void Terminate() OVERRIDE;
   virtual MojoGLES2Context CreateContext(
       MessagePipeHandle handle,
       MojoGLES2ContextLost lost_callback,
-      void* closure) OVERRIDE;
+      void* closure,
+      const MojoAsyncWaiter* async_waiter) OVERRIDE;
   virtual void DestroyContext(MojoGLES2Context context) OVERRIDE;
   virtual void MakeCurrent(MojoGLES2Context context) OVERRIDE;
   virtual void SwapBuffers() OVERRIDE;
@@ -33,8 +32,6 @@ class MOJO_GLES2_IMPL_EXPORT GLES2SupportImpl : public GLES2Support {
 
  private:
   GLES2SupportImpl();
-
-  const MojoAsyncWaiter* async_waiter_;
 };
 
 }  // namespace gles2