Restructure type tracking in StyleValues to work better with new numeric types

third_party/WebKit/Source/core/css/cssom/CSSUnitValue.cpp

 // Copyright 2017 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/cssom/CSSUnitValue.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 
 namespace blink {
 
@@ skipping 58 matching lines @@
 
 String CSSUnitValue::unit() const {
   if (unit_ == CSSPrimitiveValue::UnitType::kNumber)
     return "number";
   if (unit_ == CSSPrimitiveValue::UnitType::kPercentage)
     return "percent";
   return CSSPrimitiveValue::UnitTypeToString(unit_);
 }
 
 String CSSUnitValue::type() const {
+  return StyleValueTypeToString(GetType());
+}
+
+CSSStyleValue::StyleValueType CSSUnitValue::GetType() const {
   if (unit_ == CSSPrimitiveValue::UnitType::kNumber)
-    return "number";
+    return StyleValueType::kNumberType;
   if (unit_ == CSSPrimitiveValue::UnitType::kPercentage)
-    return "percent";
+    return StyleValueType::kPercentType;
   if (CSSPrimitiveValue::IsLength(unit_))
-    return "length";
+    return StyleValueType::kLengthType;
   if (CSSPrimitiveValue::IsAngle(unit_))
-    return "angle";
+    return StyleValueType::kAngleType;
   if (CSSPrimitiveValue::IsTime(unit_))
-    return "time";
+    return StyleValueType::kTimeType;
   if (CSSPrimitiveValue::IsFrequency(unit_))
-    return "frequency";
+    return StyleValueType::kFrequencyType;
   if (CSSPrimitiveValue::IsResolution(unit_))
-    return "resolution";
+    return StyleValueType::kResolutionType;
   if (CSSPrimitiveValue::IsFlex(unit_))
-    return "flex";
-  return "";
+    return StyleValueType::kFlexType;
+  NOTREACHED();
+  return StyleValueType::kUnknownType;
 }
 
 const CSSValue* CSSUnitValue::ToCSSValue() const {
   return CSSPrimitiveValue::Create(value_, unit_);
 }
 
 }  // namespace blink