[CSS Typed OM] Hook up getting CSSUnitValues from inline StylePropertyMaps

third_party/WebKit/Source/core/css/cssom/CSSNumericValue.h

 // 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.
 
 #ifndef CSSNumericValue_h
 #define CSSNumericValue_h
 
 #include "core/CoreExport.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/cssom/CSSStyleValue.h"
 #include "platform/bindings/ScriptWrappable.h"
 #include "platform/wtf/text/WTFString.h"
 
 namespace blink {
 
 class CSSUnitValue;
 class ExceptionState;
 
 class CORE_EXPORT CSSNumericValue : public CSSStyleValue {
   WTF_MAKE_NONCOPYABLE(CSSNumericValue);
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static CSSNumericValue* parse(const String& css_text, ExceptionState&);
-  static CSSNumericValue* FromCSSValue(const CSSValue&) {
-    // TODO(meade): Implement.
-    return nullptr;
-  }
+  static CSSNumericValue* FromCSSValue(const CSSPrimitiveValue&);
 
   virtual CSSNumericValue* add(const CSSNumericValue*, ExceptionState&) {
     // TODO(meade): Implement.
     return nullptr;
   }
   virtual CSSNumericValue* sub(const CSSNumericValue*, ExceptionState&) {
     // TODO(meade): Implement.
     return nullptr;
   }
   virtual CSSNumericValue* mul(double, ExceptionState&) {
@@ skipping 12 matching lines @@
 
   virtual CSSUnitValue* to(CSSPrimitiveValue::UnitType) { return nullptr; }
 
  protected:
   CSSNumericValue() {}
 };
 
 }  // namespace blink
 
 #endif  // CSSNumericValue_h