Add additive animation support for CSS property background-size

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

 // Copyright 2016 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/PropertyInterpolationTypesMapping.h"
 
 #include "core/HTMLNames.h"
 #include "core/animation/CSSClipInterpolationType.h"
 #include "core/animation/CSSColorInterpolationType.h"
 #include "core/animation/CSSFontWeightInterpolationType.h"
 #include "core/animation/CSSImageInterpolationType.h"
 #include "core/animation/CSSImageListInterpolationType.h"
 #include "core/animation/CSSLengthInterpolationType.h"
 #include "core/animation/CSSLengthListInterpolationType.h"
 #include "core/animation/CSSLengthPairInterpolationType.h"
 #include "core/animation/CSSMotionRotationInterpolationType.h"
 #include "core/animation/CSSNumberInterpolationType.h"
 #include "core/animation/CSSPaintInterpolationType.h"
 #include "core/animation/CSSPathInterpolationType.h"
 #include "core/animation/CSSPositionAxisListInterpolationType.h"
 #include "core/animation/CSSPositionInterpolationType.h"
 #include "core/animation/CSSShadowListInterpolationType.h"
+#include "core/animation/CSSSizeListInterpolationType.h"
 #include "core/animation/CSSTransformOriginInterpolationType.h"
 #include "core/animation/CSSTranslateInterpolationType.h"
 #include "core/animation/CSSValueInterpolationType.h"
 #include "core/animation/CSSVisibilityInterpolationType.h"
 #include "core/animation/InterpolationType.h"
 #include "core/animation/SVGAngleInterpolationType.h"
 #include "core/animation/SVGIntegerInterpolationType.h"
 #include "core/animation/SVGIntegerOptionalIntegerInterpolationType.h"
 #include "core/animation/SVGLengthInterpolationType.h"
 #include "core/animation/SVGLengthListInterpolationType.h"
@@ skipping 161 matching lines @@
         case CSSPropertyBorderTopLeftRadius:
         case CSSPropertyBorderTopRightRadius:
             applicableTypes->append(adoptPtr(new CSSLengthPairInterpolationType(cssProperty)));
             break;
         case CSSPropertyTranslate:
             applicableTypes->append(adoptPtr(new CSSTranslateInterpolationType(cssProperty)));
             break;
         case CSSPropertyTransformOrigin:
             applicableTypes->append(adoptPtr(new CSSTransformOriginInterpolationType(cssProperty)));
             break;
+        case CSSPropertyBackgroundSize:
+        case CSSPropertyWebkitMaskSize:
+            applicableTypes->append(adoptPtr(new CSSSizeListInterpolationType(cssProperty)));
+            break;
         default:
             // TODO(alancutter): Support all interpolable CSS properties here so we can stop falling back to the old StyleInterpolation implementation.
             if (CSSPropertyMetadata::isInterpolableProperty(cssProperty))
                 fallbackToLegacy = true;
             break;
         }
 
         if (!fallbackToLegacy)
             applicableTypes->append(adoptPtr(new CSSValueInterpolationType(cssProperty)));
 
@@ skipping 116 matching lines @@
 
         if (!fallbackToLegacy)
             applicableTypes->append(adoptPtr(new SVGValueInterpolationType(attribute)));
     }
 
     auto addResult = applicableTypesMap.add(property, fallbackToLegacy ? nullptr : applicableTypes.release());
     return addResult.storedValue->value.get();
 }
 
 } // namespace blink