gpu: Add calling convention for win32

skia/skia_common.gypi

 # Copyright 2013 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.
 
 # This gypi file handles the removal of platform-specific files from the
 # Skia build.
 {
   'includes': [
     # blink_skia_config.gypi defines blink_skia_defines
     '../third_party/WebKit/public/blink_skia_config.gypi',
@@ skipping 36 matching lines @@
     [ 'OS != "win"', {
       'sources/': [ ['exclude', '_win\\.(cc|cpp)$'] ],
     }],
     [ 'OS == "win"', {
       'defines': [
         # On windows, GDI handles are a scarse system-wide resource so we have to keep
         # the glyph cache, which holds up to 4 GDI handles per entry, to a fairly small
         # size.
         # http://crbug.com/314387
         'SK_DEFAULT_FONT_CACHE_COUNT_LIMIT=256',
+        'GR_GL_FUNCTION_TYPE=__stdcall',
       ],
     }],
     [ 'desktop_linux == 0 and chromeos == 0', {
       'sources/': [ ['exclude', '_linux\\.(cc|cpp)$'] ],
     }],
     [ 'use_cairo == 0', {
       'sources/': [ ['exclude', '_cairo\\.(cc|cpp)$'] ],
     }],
 
     #Settings for text blitting, chosen to approximate the system browser.
@@ skipping 104 matching lines @@
   # re-export if they include Skia headers in their public headers.
   'all_dependent_settings': {
     'include_dirs': [
       '..',
       'config',
     ],
   },
 
   'msvs_disabled_warnings': [4244, 4267, 4341, 4345, 4390, 4554, 4748, 4800],
 }