Change namespace from ui to gfx for NativePixmap related code

ui/ozone/platform/cast/surface_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/surface_factory_cast.h"
 
 #include <utility>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
@@ skipping 27 matching lines @@
   std::unique_ptr<gfx::VSyncProvider> CreateVSyncProvider() override {
     return nullptr;
   }
 
  private:
   sk_sp<SkSurface> surface_;
 
   DISALLOW_COPY_AND_ASSIGN(DummySurface);
 };
 
-class CastPixmap : public NativePixmap {
+class CastPixmap : public gfx::NativePixmap {
  public:
   explicit CastPixmap(GLOzoneEglCast* parent) : parent_(parent) {}
 
   void* GetEGLClientBuffer() const override {
     // TODO(halliwell): try to implement this through CastEglPlatform.
     return nullptr;
   }
   bool AreDmaBufFdsValid() const override { return false; }
   size_t GetDmaBufFdCount() const override { return 0; }
   int GetDmaBufFd(size_t plane) const override { return -1; }
@@ skipping 63 matching lines @@
 }
 
 std::unique_ptr<SurfaceOzoneCanvas> SurfaceFactoryCast::CreateCanvasForWidget(
     gfx::AcceleratedWidget widget) {
   // Software canvas support only in headless mode
   if (egl_implementation_)
     return nullptr;
   return base::WrapUnique<SurfaceOzoneCanvas>(new DummySurface());
 }
 
-scoped_refptr<NativePixmap> SurfaceFactoryCast::CreateNativePixmap(
+scoped_refptr<gfx::NativePixmap> SurfaceFactoryCast::CreateNativePixmap(
     gfx::AcceleratedWidget widget,
     gfx::Size size,
     gfx::BufferFormat format,
     gfx::BufferUsage usage) {
   return make_scoped_refptr(new CastPixmap(egl_implementation_.get()));
 }
 
 }  // namespace ui