Fix more uses of T* conversion operator from scoped_refptr<T> which is now removed

ui/ozone/demo/ozone_demo.cc

Index: ui/ozone/demo/ozone_demo.cc
diff --git a/ui/ozone/demo/ozone_demo.cc b/ui/ozone/demo/ozone_demo.cc
index 309b138edaec12cea764834574069cb35f80b6a5..42a626757b535f67cda1d22ea1b12e062c610396 100644
--- a/ui/ozone/demo/ozone_demo.cc
+++ b/ui/ozone/demo/ozone_demo.cc
@@ -86,14 +86,14 @@ class DemoWindow : public ui::PlatformWindowDelegate {
  private:
   bool InitializeGLSurface() {
     surface_ = gfx::GLSurface::CreateViewGLSurface(GetAcceleratedWidget());
-    if (!surface_) {
+    if (!surface_.get()) {
       LOG(ERROR) << "Failed to create GL surface";
       return false;
     }
 
     context_ = gfx::GLContext::CreateGLContext(
         NULL, surface_.get(), gfx::PreferIntegratedGpu);
-    if (!context_) {
+    if (!context_.get()) {
       LOG(ERROR) << "Failed to create GL context";
       surface_ = NULL;
       return false;