Remove DEFINE_STATIC_REF calls from header files

third_party/WebKit/Source/platform/animation/TimingFunction.h

Index: third_party/WebKit/Source/platform/animation/TimingFunction.h
diff --git a/third_party/WebKit/Source/platform/animation/TimingFunction.h b/third_party/WebKit/Source/platform/animation/TimingFunction.h
index 55758d6762e915e6bf85380024a5c3ab4600e394..9a7a777c3c36522b90cca9f4779918aae7668cd3 100644
--- a/third_party/WebKit/Source/platform/animation/TimingFunction.h
+++ b/third_party/WebKit/Source/platform/animation/TimingFunction.h
@@ -94,34 +94,7 @@ class PLATFORM_EXPORT CubicBezierTimingFunction final : public TimingFunction {
     return AdoptRef(new CubicBezierTimingFunction(x1, y1, x2, y2));
   }
 
-  static CubicBezierTimingFunction* Preset(EaseType ease_type) {
-    DEFINE_STATIC_REF(
-        CubicBezierTimingFunction, ease,
-        (AdoptRef(new CubicBezierTimingFunction(EaseType::EASE))));
-    DEFINE_STATIC_REF(
-        CubicBezierTimingFunction, ease_in,
-        (AdoptRef(new CubicBezierTimingFunction(EaseType::EASE_IN))));
-    DEFINE_STATIC_REF(
-        CubicBezierTimingFunction, ease_out,
-        (AdoptRef(new CubicBezierTimingFunction(EaseType::EASE_OUT))));
-    DEFINE_STATIC_REF(
-        CubicBezierTimingFunction, ease_in_out,
-        (AdoptRef(new CubicBezierTimingFunction(EaseType::EASE_IN_OUT))));
-
-    switch (ease_type) {
-      case EaseType::EASE:
-        return ease;
-      case EaseType::EASE_IN:
-        return ease_in;
-      case EaseType::EASE_OUT:
-        return ease_out;
-      case EaseType::EASE_IN_OUT:
-        return ease_in_out;
-      default:
-        NOTREACHED();
-        return nullptr;
-    }
-  }
+  static CubicBezierTimingFunction* Preset(EaseType);
 
   ~CubicBezierTimingFunction() override {}