Replace scoped_ptr with std::unique_ptr in //ui

ui/gl/gl_context_mac.mm

 // Copyright (c) 2012 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.
 
+#include <memory>
+
 #include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/gl/gl_context_cgl.h"
 #include "ui/gl/gl_context_osmesa.h"
 #include "ui/gl/gl_context_stub.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gl_switches.h"
 
 namespace gfx {
 
@@ skipping 28 matching lines @@
     }
     case kGLImplementationMockGL:
       return new GLContextStub;
     default:
       NOTREACHED();
       return NULL;
   }
 }
 
 }  // namespace gfx