Clamp filter functions {grayscale, invert, opacity, sepia} to 100%

third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp

Index: third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp b/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
index 199002ba26900add3c16777b503e180bdda07e81..90d4462a74cae8cd2715c52fe25163a01d684766 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
+++ b/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
@@ -1455,9 +1455,13 @@ static CSSFunctionValue* consumeFilterFunction(CSSParserTokenRange& range, CSSPa
             if (!parsedValue)
                 parsedValue = consumeNumber(args, ValueRangeNonNegative);
             if (parsedValue && filterType != CSSValueSaturate && filterType != CSSValueContrast) {
-                double maxAllowed = toCSSPrimitiveValue(parsedValue)->isPercentage() ? 100.0 : 1.0;
-                if (toCSSPrimitiveValue(parsedValue)->getDoubleValue() > maxAllowed)
-                    return nullptr;
+                bool isPercentage = toCSSPrimitiveValue(parsedValue)->isPercentage();
+                double maxAllowed = isPercentage ? 100.0 : 1.0;
+                if (toCSSPrimitiveValue(parsedValue)->getDoubleValue() > maxAllowed) {
+                    parsedValue = CSSPrimitiveValue::create(
+                        maxAllowed,
+                        isPercentage ? CSSPrimitiveValue::UnitType::Percentage : CSSPrimitiveValue::UnitType::Number);
+                }
             }
         }
     }