Implement frames() timing function

third_party/WebKit/Source/core/css/ComputedStyleCSSValueMapping.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc.
  * All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1332 matching lines @@
              position == StepsTimingFunction::StepPosition::END);
 
       if (steps > 1)
         return CSSStepsTimingFunctionValue::Create(steps, position);
       CSSValueID value_id = position == StepsTimingFunction::StepPosition::START
                                 ? CSSValueStepStart
                                 : CSSValueStepEnd;
       return CSSIdentifierValue::Create(value_id);
     }
 
+    case TimingFunction::Type::FRAMES: {
+      const FramesTimingFunction* frames_timing_function =
+          ToFramesTimingFunction(timing_function);
+      int frames = frames_timing_function->NumberOfFrames();
+      return CSSFramesTimingFunctionValue::Create(frames);
+    }
+
     default:
       return CSSIdentifierValue::Create(CSSValueLinear);
   }
 }
 
 static CSSValue* ValueForAnimationTimingFunction(
     const CSSTimingData* timing_data) {
   CSSValueList* list = CSSValueList::CreateCommaSeparated();
   if (timing_data) {
     for (size_t i = 0; i < timing_data->TimingFunctionList().size(); ++i)
@@ skipping 2380 matching lines @@
     case CSSPropertyAll:
       return nullptr;
     default:
       break;
   }
   NOTREACHED();
   return nullptr;
 }
 
 }  // namespace blink