Web Animations: Throw TypeErrors for invalid timing parameters

third_party/WebKit/Source/core/animation/TimingInput.h

Index: third_party/WebKit/Source/core/animation/TimingInput.h
diff --git a/third_party/WebKit/Source/core/animation/TimingInput.h b/third_party/WebKit/Source/core/animation/TimingInput.h
index 2611357da2fd923ed0ed6be39b670848109b70b3..e72bc6a81f5c7cdc9edf3b6af905874b51eee1d8 100644
--- a/third_party/WebKit/Source/core/animation/TimingInput.h
+++ b/third_party/WebKit/Source/core/animation/TimingInput.h
@@ -15,19 +15,20 @@ class Dictionary;
 class Document;
 class ExceptionState;
 class KeyframeEffectOptions;
+class UnrestrictedDoubleOrString;
 
 class CORE_EXPORT TimingInput {
     STATIC_ONLY(TimingInput);
 public:
     static bool convert(const KeyframeEffectOptions& timingInput, Timing& timingOutput, Document*, ExceptionState&);
-    static Timing convert(double duration);
+    static bool convert(double duration, Timing& timingOutput, ExceptionState&);
 
     static void setStartDelay(Timing&, double startDelay);
     static void setEndDelay(Timing&, double endDelay);
     static void setFillMode(Timing&, const String& fillMode);
-    static void setIterationStart(Timing&, double iterationStart);
-    static void setIterationCount(Timing&, double iterationCount);
-    static void setIterationDuration(Timing&, double iterationDuration);
+    static bool setIterationStart(Timing&, double iterationStart, ExceptionState&);
+    static bool setIterationCount(Timing&, double iterationCount, ExceptionState&);
+    static bool setIterationDuration(Timing&, const UnrestrictedDoubleOrString&, ExceptionState&);
     static void setPlaybackRate(Timing&, double playbackRate);
     static void setPlaybackDirection(Timing&, const String& direction);
     static bool setTimingFunction(Timing&, const String& timingFunctionString, Document*, ExceptionState&);