Support animating <angle> custom properties

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

Index: third_party/WebKit/Source/core/animation/CSSInterpolationTypesMap.cpp
diff --git a/third_party/WebKit/Source/core/animation/CSSInterpolationTypesMap.cpp b/third_party/WebKit/Source/core/animation/CSSInterpolationTypesMap.cpp
index 06b707d8353fb22edf79a9fa10b5c40d75d7db2d..26bdb04726325217ade6c09c000568fc8c0851d4 100644
--- a/third_party/WebKit/Source/core/animation/CSSInterpolationTypesMap.cpp
+++ b/third_party/WebKit/Source/core/animation/CSSInterpolationTypesMap.cpp
@@ -5,6 +5,7 @@
 #include "core/animation/CSSInterpolationTypesMap.h"
 
 #include <memory>
+#include "core/animation/CSSAngleInterpolationType.h"
 #include "core/animation/CSSBasicShapeInterpolationType.h"
 #include "core/animation/CSSBorderImageLengthBoxInterpolationType.h"
 #include "core/animation/CSSClipInterpolationType.h"
@@ -339,6 +340,9 @@ CSSInterpolationTypesMap::createCSSInterpolationTypesForSyntax(
     }
 
     switch (component.m_type) {
+      case CSSSyntaxType::Angle:
+        result.push_back(WTF::makeUnique<CSSAngleInterpolationType>(property));
+        break;
       case CSSSyntaxType::Color:
         result.push_back(WTF::makeUnique<CSSColorInterpolationType>(property));
         break;
@@ -353,7 +357,6 @@ CSSInterpolationTypesMap::createCSSInterpolationTypesForSyntax(
       case CSSSyntaxType::Image:
       case CSSSyntaxType::Url:
       case CSSSyntaxType::Integer:
-      case CSSSyntaxType::Angle:
       case CSSSyntaxType::Time:
       case CSSSyntaxType::Resolution:
       case CSSSyntaxType::TransformFunction: