Implement frames() timing function

third_party/WebKit/Source/core/css/CSSTimingFunctionValue.h

 /*
  * Copyright (C) 2007, 2008, 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 88 matching lines @@
         steps_(steps),
         step_position_(step_position) {}
 
   int steps_;
   StepsTimingFunction::StepPosition step_position_;
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSStepsTimingFunctionValue,
                             IsStepsTimingFunctionValue());
 
+class CSSFramesTimingFunctionValue : public CSSValue {
+ public:
+  static CSSFramesTimingFunctionValue* Create(int frames) {
+    return new CSSFramesTimingFunctionValue(frames);
+  }
+
+  int NumberOfFrames() const { return frames_; }
+
+  String CustomCSSText() const;
+
+  bool Equals(const CSSFramesTimingFunctionValue&) const;
+
+  DEFINE_INLINE_TRACE_AFTER_DISPATCH() {
+    CSSValue::TraceAfterDispatch(visitor);
+  }
+
+ private:
+  CSSFramesTimingFunctionValue(int frames)
+      : CSSValue(kFramesTimingFunctionClass), frames_(frames) {}
+
+  int frames_;
+};
+
+DEFINE_CSS_VALUE_TYPE_CASTS(CSSFramesTimingFunctionValue,
+                            IsFramesTimingFunctionValue());
+
 }  // namespace blink
 
 #endif