Modifications to get skia headers compiling on iOS.

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 985 matching lines @@
               ],
             }],
             [ '_toolset=="host" and host_os=="linux"', {
               'sources': [
                 'ext/platform_device_linux.cc',
                 'ext/platform_canvas_linux.cc',
               ],
             }],
           ],
         }],
+        [ 'OS == "ios"', {
+          'sources/': [
+            # iOS does not require most of skia and only needs a single file.
+            # Rather than creating a separate top-level target, simply exclude
+            # all files except for the one that is needed.
+            ['exclude', '.*'],
+            ['include', '^ext/google_logging\\.cc$'],
+          ],
+        }],
         [ 'OS == "mac"', {
           'defines': [
             'SK_BUILD_FOR_MAC',
           ],
           'include_dirs': [
             '../third_party/skia/include/utils/mac',
           ],
           'link_settings': {
             'libraries': [
               '$(SDKROOT)/System/Library/Frameworks/AppKit.framework',
@@ skipping 49 matching lines @@
           'dependencies': [
             '../base/base.gyp:base',
           ],
           'direct_dependent_settings': {
             'defines': [
               'GR_DLL',
               'SKIA_DLL',
             ],
           },
         }],
-      ],
-      'dependencies': [
-        'skia_opts',
-        '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
-        '../third_party/sfntly/sfntly.gyp:sfntly',
-        '../third_party/zlib/zlib.gyp:zlib',
+        ['OS != "ios"', {
+
+          'dependencies': [
+            'skia_opts',
+            '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
+            '../third_party/sfntly/sfntly.gyp:sfntly',
+            '../third_party/zlib/zlib.gyp:zlib',
+          ],
+        }],
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           'config',
           '../third_party/skia/include/config',
           '../third_party/skia/include/core',
           '../third_party/skia/include/effects',
           '../third_party/skia/include/pdf',
           '../third_party/skia/include/gpu',
           '../third_party/skia/include/gpu/gl',
@@ skipping 228 matching lines @@
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'ext/image_operations_bench.cc',
       ],
     },
   ],
 }