Change namespace from ui to gfx for NativePixmap related code

ui/ozone/platform/cast/client_native_pixmap_factory_cast.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 "ui/ozone/platform/cast/client_native_pixmap_factory_cast.h"
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "ui/gfx/buffer_types.h"
 #include "ui/gfx/client_native_pixmap.h"
 #include "ui/gfx/client_native_pixmap_factory.h"
 
 namespace ui {
 namespace {
 
 // Dummy ClientNativePixmap implementation for Cast ozone.
 // Our NativePixmaps are just used to plumb an overlay frame through,
 // so they get instantiated, but not used.
-class ClientNativePixmapCast : public ClientNativePixmap {
+class ClientNativePixmapCast : public gfx::ClientNativePixmap {
  public:
   // ClientNativePixmap implementation:
   bool Map() override {
     NOTREACHED();
     return false;
   }
   void* GetMemoryAddress(size_t plane) const override {
     NOTREACHED();
     return nullptr;
   };
   void Unmap() override { NOTREACHED(); }
   int GetStride(size_t plane) const override {
     NOTREACHED();
     return 0;
   }
 };
 
-class ClientNativePixmapFactoryCast : public ClientNativePixmapFactory {
+class ClientNativePixmapFactoryCast : public gfx::ClientNativePixmapFactory {
  public:
   // ClientNativePixmapFactoryCast implementation:
   bool IsConfigurationSupported(gfx::BufferFormat format,
                                 gfx::BufferUsage usage) const override {
     return format == gfx::BufferFormat::RGBA_8888 &&
            usage == gfx::BufferUsage::SCANOUT;
   }
 
-  std::unique_ptr<ClientNativePixmap> ImportFromHandle(
+  std::unique_ptr<gfx::ClientNativePixmap> ImportFromHandle(
       const gfx::NativePixmapHandle& handle,
       const gfx::Size& size,
       gfx::BufferUsage usage) override {
     return base::MakeUnique<ClientNativePixmapCast>();
   }
 };
 
 }  // namespace
 
-ClientNativePixmapFactory* CreateClientNativePixmapFactoryCast() {
+gfx::ClientNativePixmapFactory* CreateClientNativePixmapFactoryCast() {
   return new ClientNativePixmapFactoryCast();
 }
 
 }  // namespace ui