Add a new API to create a surfaceless GLSurface for Ozone

ui/gl/gl_surface.h

 // 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.
 
 #ifndef UI_GL_GL_SURFACE_H_
 #define UI_GL_GL_SURFACE_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 138 matching lines @@
                                     GLImage* image,
                                     const Rect& bounds_rect,
                                     const RectF& crop_rect);
 
   virtual bool IsSurfaceless() const;
 
   // Create a GL surface that renders directly to a view.
   static scoped_refptr<GLSurface> CreateViewGLSurface(
       gfx::AcceleratedWidget window);
 
+#if defined(USE_OZONE)
+  // Create a GL surface that renders directly into a window with surfaceless
+  // semantics - there is no default framebuffer and the primary surface must
+  // be presented as an overlay. If surfaceless mode is not supported or
+  // enabled it will return a null pointer.
+  static scoped_refptr<GLSurface> CreateSurfacelessViewGLSurface(
+      gfx::AcceleratedWidget window);
+#endif  // defined(USE_OZONE)
+
   // Create a GL surface used for offscreen rendering.
   static scoped_refptr<GLSurface> CreateOffscreenGLSurface(
       const gfx::Size& size);
 
   static GLSurface* GetCurrent();
 
   // Called when the swap interval for the associated context changes.
   virtual void OnSetSwapInterval(int interval);
 
  protected:
@@ skipping 60 matching lines @@
 
  private:
   scoped_refptr<GLSurface> surface_;
 
   DISALLOW_COPY_AND_ASSIGN(GLSurfaceAdapter);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_SURFACE_H_