[Ozone-Demo] Update Surfaceless renderer

Fixes the surfaceless renderer since it now has a specfic API for the
creation of the GLSurface.

BUG=none
TEST=Run ./ozone_demo --ozone-platform=gbm --ozone-use-surfaceless

Review URL: https://codereview.chromium.org/975733004

Cr-Commit-Position: refs/heads/master@{#318956}

ui/ozone/demo/gl_renderer.cc

@@ -18,7 +18,7 @@ GlRenderer::~GlRenderer() {
 }
 
 bool GlRenderer::Initialize() {
-  surface_ = gfx::GLSurface::CreateViewGLSurface(widget_);
+  surface_ = CreateSurface();
   if (!surface_.get()) {
     LOG(ERROR) << "Failed to create GL surface";
     return false;
@@ -54,4 +54,8 @@ void GlRenderer::RenderFrame() {
     LOG(FATAL) << "Failed to swap buffers";
 }
 
+scoped_refptr<gfx::GLSurface> GlRenderer::CreateSurface() {
+  return gfx::GLSurface::CreateViewGLSurface(widget_);
+}
+
 }  // namespace ui

ui/ozone/demo/gl_renderer.h

@@ -26,6 +26,8 @@ class GlRenderer : public RendererBase {
   void RenderFrame() override;
 
  protected:
+  virtual scoped_refptr<gfx::GLSurface> CreateSurface();
+
   scoped_refptr<gfx::GLSurface> surface_;
   scoped_refptr<gfx::GLContext> context_;
 

ui/ozone/demo/surfaceless_gl_renderer.cc

@@ -133,4 +133,8 @@ void SurfacelessGlRenderer::OnSwapBuffersAck() {
   back_buffer_ ^= 1;
 }
 
+scoped_refptr<gfx::GLSurface> SurfacelessGlRenderer::CreateSurface() {
+  return gfx::GLSurface::CreateSurfacelessViewGLSurface(widget_);
+}
+
 }  // namespace ui

ui/ozone/demo/surfaceless_gl_renderer.h

@@ -32,6 +32,9 @@ class SurfacelessGlRenderer : public GlRenderer {
   // Called by swap buffers when the actual swap finished.
   void OnSwapBuffersAck();
 
+  // GlRenderer:
+  scoped_refptr<gfx::GLSurface> CreateSurface() override;
+
   class BufferWrapper {
    public:
     BufferWrapper();