Convert Ozone GL OSMesa implementation.

ui/ozone/common/gl_ozone_osmesa.h

+// Copyright 2017 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_OZONE_COMMON_GL_OZONE_OSMESA_H_
+#define UI_OZONE_COMMON_GL_OZONE_OSMESA_H_
+
+#include "base/macros.h"
+#include "ui/gl/gl_implementation.h"
+#include "ui/ozone/public/gl_ozone.h"
+
+namespace ui {
+
+// GLOzone implementation that uses OSMesa.
+class GLOzoneOSMesa : public GLOzone {
+ public:
+  GLOzoneOSMesa() {}
+  ~GLOzoneOSMesa() override {}

[rjkroege, 2017/03/03 19:09:45]

it use to be that you would have to put this in the .cc file to avoid making
windows unhappy. If we ever wanted to use ozone on windows, should you consider
doing that?

[kylechar, 2017/03/03 19:13:56]

Moved to .cc.

+
+  // GLOzone:
+  bool InitializeGLOneOffPlatform() override;
+  bool InitializeStaticGLBindings(gl::GLImplementation implementation) override;
+  void InitializeDebugGLBindings() override;
+  void ShutdownGL() override;
+  bool GetGLWindowSystemBindingInfo(
+      gl::GLWindowSystemBindingInfo* info) override;
+  scoped_refptr<gl::GLContext> CreateGLContext(
+      gl::GLShareGroup* share_group,
+      gl::GLSurface* compatible_surface,
+      const gl::GLContextAttribs& attribs) override;
+  scoped_refptr<gl::GLSurface> CreateViewGLSurface(
+      gfx::AcceleratedWidget window) override;
+  scoped_refptr<gl::GLSurface> CreateSurfacelessViewGLSurface(
+      gfx::AcceleratedWidget window) override;
+  scoped_refptr<gl::GLSurface> CreateOffscreenGLSurface(
+      const gfx::Size& size) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(GLOzoneOSMesa);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_COMMON_GL_OZONE_OSMESA_H_