Ensure baseComputedStyle optimisation is cleared during registered custom property animations

third_party/WebKit/Source/core/css/PropertyRegistration.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/css/PropertyRegistration.h"
 
 #include "core/animation/CSSInterpolationTypesMap.h"
 #include "core/css/CSSStyleSheet.h"
 #include "core/css/CSSSyntaxDescriptor.h"
 #include "core/css/CSSValueList.h"
@@ skipping 69 matching lines @@
     return true;
   }
 
   // TODO(timloh): Images and transform-function values can also contain
   // lengths.
 
   return true;
 }
 
 void PropertyRegistration::registerProperty(
-    ScriptState* scriptState,
+    ExecutionContext* executionContext,
     const PropertyDescriptor& descriptor,
     ExceptionState& exceptionState) {
   // Bindings code ensures these are set.
   DCHECK(descriptor.hasName());
   DCHECK(descriptor.hasInherits());
   DCHECK(descriptor.hasSyntax());
 
   String name = descriptor.name();
   if (!CSSVariableParser::isValidVariableName(name)) {
     exceptionState.throwDOMException(
         SyntaxError, "Custom property names must start with '--'.");
     return;
   }
   AtomicString atomicName(name);
-  Document* document = toDocument(scriptState->getExecutionContext());
+  Document* document = toDocument(executionContext);
   PropertyRegistry& registry = *document->propertyRegistry();
   if (registry.registration(atomicName)) {
     exceptionState.throwDOMException(
         InvalidModificationError,
         "The name provided has already been registered.");
     return;
   }
 
   CSSSyntaxDescriptor syntaxDescriptor(descriptor.syntax());
   if (!syntaxDescriptor.isValid()) {
@@ skipping 45 matching lines @@
                               std::move(cssInterpolationTypes));
   }
 
   // TODO(timloh): Invalidate only elements with this custom property set
   document->setNeedsStyleRecalc(SubtreeStyleChange,
                                 StyleChangeReasonForTracing::create(
                                     StyleChangeReason::PropertyRegistration));
 }
 
 }  // namespace blink