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

ui/ozone/demo/ozone_demo.cc

 // Copyright 2014 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 "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/timer/timer.h"
 #include "third_party/skia/include/core/SkCanvas.h"
@@ skipping 68 matching lines @@
   virtual void OnAcceleratedWidgetAvailable(
       gfx::AcceleratedWidget widget) OVERRIDE {
     DCHECK_NE(widget, gfx::kNullAcceleratedWidget);
     widget_ = widget;
   }
   virtual void OnActivationChanged(bool active) OVERRIDE {}
 
  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;
     }
 
     surface_->Resize(GetSize());
 
     if (!context_->MakeCurrent(surface_.get())) {
       LOG(ERROR) << "Failed to make GL context current";
       surface_ = NULL;
@@ skipping 106 matching lines @@
   DemoWindow* window = new DemoWindow;
   window->Start();
 
   // Run the message loop until there's nothing left to do.
   // TODO(spang): Should we use QuitClosure instead?
   base::RunLoop run_loop;
   run_loop.RunUntilIdle();
 
   return 0;
 }