Generate ax enums from idl.

ui/accessibility/accessibility.gyp

Index: ui/accessibility/accessibility.gyp
diff --git a/ui/accessibility/accessibility.gyp b/ui/accessibility/accessibility.gyp
index 2db99d636ce93e90c3c68d571e99a3e5a0d56427..5d4377591861200d465ad0a1a1e323259b33d561 100644
--- a/ui/accessibility/accessibility.gyp
+++ b/ui/accessibility/accessibility.gyp
@@ -12,6 +12,7 @@
       'target_name': 'accessibility',
       'type': '<(component)',
       'dependencies': [
+        ':ax',
         '../../base/base.gyp:base',
         '../gfx/gfx.gyp:gfx',
         '../gfx/gfx.gyp:gfx_geometry',
@@ -54,5 +55,26 @@
         'ax_tree_unittest.cc',
       ]
     },
+    {
+      'target_name': 'ax',
+      'type': 'static_library',
+      'sources': [
+        '<@(schema_files)',
+      ],
+      'msvs_disabled_warnings': [ 4267 ],
+      'includes': [
+        '../../build/json_schema_bundle_compile.gypi',
+        '../../build/json_schema_compile.gypi',
+      ],
+      'variables': {
+        'chromium_code': 1,
+        'schema_files': [
+          'ui.idl',
+        ],
+        'non_compiled_schema_files': [],
+        'cc_dir': 'ui/accessibility',
+        'root_namespace': '',
+      },
+    },
   ],
 }