GLContextNSView should not assume concrete type GLSurface is GLSurfaceNSView

ui/gfx/gl/gl_surface_nsview.mm

Index: ui/gfx/gl/gl_surface_nsview.mm
diff --git a/ui/gfx/gl/gl_surface_nsview.mm b/ui/gfx/gl/gl_surface_nsview.mm
index 0c7f3aab5fca5017f45b45187fa859bbd5307bcd..e03cb3bbf41f775bab286959841947b0aabc20ac 100644
--- a/ui/gfx/gl/gl_surface_nsview.mm
+++ b/ui/gfx/gl/gl_surface_nsview.mm
@@ -39,8 +39,9 @@ void* GLSurfaceNSView::GetHandle() {
   return view_;
 }
 
-void GLSurfaceNSView::SetGLContext(GLContextNSView* context) {
-  context_ = context;
+bool GLSurfaceNSView::OnMakeCurrent(GLContext* context) {
+  context_ = static_cast<GLContextNSView *>(context);

[Ken Russell (switch to Gerrit), 2011/11/30 00:39:01]

Given the other cleanup in this CL, the downcast is unfortunate. This is the
first platform that has different context types for different surfaces.
Presumably MakeCurrent should do some validation that you're using compatible
contexts and surfaces. Anyway, this is a cleanup for the future.

+  return true;
 }
 
 }  // namespace gfx