Implement frames() timing function

third_party/WebKit/Source/core/animation/AnimationInputHelpersTest.cpp

 // Copyright 2014 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.
 
 #include "core/animation/AnimationInputHelpers.h"
 
 #include "core/dom/Element.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/testing/DummyPageHolder.h"
 #include "platform/animation/TimingFunction.h"
@@ skipping 95 matching lines @@
   timingFunctionThrows("", exceptionState);
   timingFunctionThrows("initial", exceptionState);
   timingFunctionThrows("inherit", exceptionState);
   timingFunctionThrows("unset", exceptionState);
 
   timingFunctionRoundTrips("ease", exceptionState);
   timingFunctionRoundTrips("linear", exceptionState);
   timingFunctionRoundTrips("ease-in", exceptionState);
   timingFunctionRoundTrips("ease-out", exceptionState);
   timingFunctionRoundTrips("ease-in-out", exceptionState);
+  timingFunctionRoundTrips("frames(3)", exceptionState);
   timingFunctionRoundTrips("cubic-bezier(0.1, 5, 0.23, 0)", exceptionState);
 
   EXPECT_EQ("steps(1, start)",
             parseTimingFunction("step-start", exceptionState)->toString());
   EXPECT_EQ("steps(1, middle)",
             parseTimingFunction("step-middle", exceptionState)->toString());
   EXPECT_EQ("steps(1)",
             parseTimingFunction("step-end", exceptionState)->toString());
   EXPECT_EQ("steps(3, start)",
             parseTimingFunction("steps(3, start)", exceptionState)->toString());
   EXPECT_EQ(
       "steps(3, middle)",
       parseTimingFunction("steps(3, middle)", exceptionState)->toString());
   EXPECT_EQ("steps(3)",
             parseTimingFunction("steps(3, end)", exceptionState)->toString());
   EXPECT_EQ("steps(3)",
             parseTimingFunction("steps(3)", exceptionState)->toString());
 
   timingFunctionThrows("steps(3, nowhere)", exceptionState);
   timingFunctionThrows("steps(-3, end)", exceptionState);
+  timingFunctionThrows("frames(3, end)", exceptionState);
+  timingFunctionThrows("frames(1)", exceptionState);
   timingFunctionThrows("cubic-bezier(0.1, 0, 4, 0.4)", exceptionState);
 }
 
 }  // namespace blink