Revert of Add FontFaceDescriptors IDL dictionary

Source/core/core.gypi

 {
     'includes': [
       'core_generated.gypi',
     ],
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/Animation.idl',
             'animation/AnimationEffect.idl',
             'animation/AnimationPlayer.idl',
@@ skipping 3318 matching lines @@
             'svg/graphics/SVGImageForContainer.h',
             'svg/graphics/filters/SVGFEImage.cpp',
             'svg/graphics/filters/SVGFEImage.h',
             'svg/graphics/filters/SVGFilter.cpp',
             'svg/graphics/filters/SVGFilter.h',
             'svg/graphics/filters/SVGFilterBuilder.cpp',
             'svg/graphics/filters/SVGFilterBuilder.h',
             'svg/properties/SVGAnimatedProperty.cpp',
             'svg/properties/SVGPropertyTearOff.cpp',
         ],
-        'core_dictionary_idl_files': [
-          'css/FontFaceDescriptors.idl',
-        ],
-        'generated_core_dictionary_files': [
-          '<(blink_core_output_dir)/css/FontFaceDescriptors.cpp',
-          '<(blink_core_output_dir)/css/FontFaceDescriptors.h',
-        ],
+        # FIXME: http://crbug.com/403150
+        # Add 'core_dictionary_idl_files' and
+        # 'generated_core_dictionary_files' variables.
+        # The variables should contain IDL dictionary files and generated files
+        # They would look like below:
+        # 'core_dictionary_idl_files': [
+        #   'css/FontFaceDescriptors.idl',
+        # ],
+        # 'generated_core_dictionary_files': [
+        #   '<(blink_core_output_dir)/css/FontFaceDescriptors.cpp',
+        #   '<(blink_core_output_dir)/css/FontFaceDescriptors.h',
+        # ],
         'core_testing_dictionary_idl_files': [
           'testing/InternalDictionary.idl',
         ],
         'webcore_testing_idl_files': [
           'testing/DictionaryTest.idl',
           'testing/GarbageCollectedScriptWrappable.idl',
           'testing/GCObservation.idl',
           'testing/InternalProfilers.idl',
           'testing/InternalSettings.idl',
           'testing/Internals.idl',
@@ skipping 142 matching lines @@
             'rendering/shapes/BoxShapeTest.cpp',
             'rendering/style/OutlineValueTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'streams/ReadableStreamTest.cpp',
             'testing/UnitTestHelpers.cpp',
             'testing/UnitTestHelpers.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }