Add a factory and defines for native Linux surfaces.

ui/gl/gl_context_nsl.cc

Index: ui/gl/gl_context_nsl.cc
diff --git a/ui/gl/gl_context_nsl.cc b/ui/gl/gl_context_nsl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..aeb91953df78b50bdf34af22cb8ced2d5494d8f1
--- /dev/null
+++ b/ui/gl/gl_context_nsl.cc
@@ -0,0 +1,40 @@
+// Copyright (c) 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.
+
+#include "ui/gl/gl_context.h"
+
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+#include "base/sys_info.h"
+#include "ui/gl/gl_bindings.h"
+#include "ui/gl/gl_context_egl.h"
+#include "ui/gl/gl_context_stub.h"
+#include "ui/gl/gl_implementation.h"
+#include "ui/gl/gl_surface.h"
+
+namespace gfx {
+
+// static
+scoped_refptr<GLContext> GLContext::CreateGLContext(
+    GLShareGroup* share_group,
+    GLSurface* compatible_surface,
+    GpuPreference gpu_preference) {
+  if (GetGLImplementation() == kGLImplementationMockGL)
+    return scoped_refptr<GLContext>(new GLContextStub());
+
+  scoped_refptr<GLContext> context;
+  if (!compatible_surface->GetHandle()) {
+    DLOG(ERROR) << "Surface has no associated handle.\n";
+    return NULL;
+  }
+
+  context = new GLContextEGL(share_group);
+
+  if (!context->Initialize(compatible_surface, gpu_preference))
+    return NULL;
+  return context;
+}
+
+}  // namespace gfx
+