Fix implicit access to raw pointer of scoped_refptr.

ui/gl/gl_image_ozone_native_pixmap_unittest.cc

 // Copyright 2015 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 <stdint.h>
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/buffer_types.h"
 #include "ui/gl/gl_image_ozone_native_pixmap.h"
 #include "ui/gl/test/gl_image_test_template.h"
 #include "ui/ozone/public/ozone_platform.h"
 #include "ui/ozone/public/surface_factory_ozone.h"
 
 namespace gl {
 namespace {
 
 class GLImageOzoneNativePixmapTestDelegate {
  public:
   scoped_refptr<gl::GLImage> CreateSolidColorImage(
       const gfx::Size& size,
       const uint8_t color[4]) const {
     ui::SurfaceFactoryOzone* surface_factory =
         ui::OzonePlatform::GetInstance()->GetSurfaceFactoryOzone();
     scoped_refptr<ui::NativePixmap> pixmap =
         surface_factory->CreateNativePixmap(gfx::kNullAcceleratedWidget, size,
                                             gfx::BufferFormat::RGBA_8888,
                                             gfx::BufferUsage::SCANOUT);
-    EXPECT_TRUE(pixmap != nullptr);
+    EXPECT_TRUE(pixmap);
     scoped_refptr<gfx::GLImageOzoneNativePixmap> image(
         new gfx::GLImageOzoneNativePixmap(size, GL_RGBA));
     EXPECT_TRUE(image->Initialize(pixmap.get(), pixmap->GetBufferFormat()));
     return image;
   }
 
   unsigned GetTextureTarget() const { return GL_TEXTURE_2D; }
 };
 
 INSTANTIATE_TYPED_TEST_CASE_P(GLImageOzoneNativePixmap,
                               GLImageTest,
                               GLImageOzoneNativePixmapTestDelegate);
 
 }  // namespace
 }  // namespace gl