Add skia::RefPtr class to wrap ref counted classes from Skia.

skia/skia.gyp

 # Copyright (c) 2012 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.
 
 {
   'targets': [
     {
       'target_name': 'skia',
       'type': '<(component)',
       'variables': {
@@ skipping 158 matching lines @@
         'ext/image_operations.h',
         'ext/lazy_pixel_ref.h',
         'ext/SkThread_chrome.cc',
         'ext/platform_canvas.cc',
         'ext/platform_canvas.h',
         'ext/platform_device.cc',
         'ext/platform_device.h',
         'ext/platform_device_linux.cc',
         'ext/platform_device_mac.cc',
         'ext/platform_device_win.cc',
+        'ext/refptr.h',
         'ext/SkMemory_new_handler.cpp',
         'ext/skia_sandbox_support_win.h',
         'ext/skia_sandbox_support_win.cc',
         'ext/skia_trace_shim.h',
         'ext/skia_utils_ios.mm',
         'ext/skia_utils_ios.h',
         'ext/skia_utils_mac.mm',
         'ext/skia_utils_mac.h',
         'ext/skia_utils_win.cc',
         'ext/skia_utils_win.h',
@@ skipping 650 matching lines @@
           'sources': [
             '../third_party/skia/src/opts/SkBitmapProcState_opts_none.cpp',
             '../third_party/skia/src/opts/SkBlitRow_opts_none.cpp',
             '../third_party/skia/src/opts/SkUtils_opts_none.cpp',
           ],
         },
       ],
     }],
   ],
 }