ozone: rename to GpuMemoryBuffer(Factory|Impl)OzoneNativePixmap.

ui/ozone/gpu/ozone_gpu.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
       'target_name': 'ozone_gpu',
       'type': '<(component)',
       'dependencies': [
         '../../../base/base.gyp:base',
         '../../gfx/gfx.gyp:gfx',
         '../../gfx/gfx.gyp:gfx_geometry',
         '../../gl/gl.gyp:gl',
         '../ozone.gyp:ozone',
       ],
       'defines': [
         'OZONE_GPU_IMPLEMENTATION',
       ],
       'sources': [
-        'gpu_memory_buffer_factory_ozone_native_buffer.cc',
-        'gpu_memory_buffer_factory_ozone_native_buffer.h',
+        'gpu_memory_buffer_factory_ozone_native_pixmap.cc',
+        'gpu_memory_buffer_factory_ozone_native_pixmap.h',
       ],
     },
   ],
 }