[Typed CSSOM] Get computed values for custom properties

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

Index: third_party/WebKit/Source/core/css/cssom/StylePropertyMap.h
diff --git a/third_party/WebKit/Source/core/css/cssom/StylePropertyMap.h b/third_party/WebKit/Source/core/css/cssom/StylePropertyMap.h
index cb3eb3f804b2178e5e094b29f2139694e4189644..739854cca113cb3efbeea1d1fe040791af56d759 100644
--- a/third_party/WebKit/Source/core/css/cssom/StylePropertyMap.h
+++ b/third_party/WebKit/Source/core/css/cssom/StylePropertyMap.h
@@ -61,8 +61,10 @@ class CORE_EXPORT StylePropertyMap
   StylePropertyMap() {}
 
   virtual CSSStyleValueVector getAllInternal(CSSPropertyID) = 0;
-  virtual CSSStyleValueVector getAllInternal(
-      AtomicString customPropertyName) = 0;
+  // TODO(rjwright): Remove the ExceptionState arg once
+  // InlineStypePropertyMap::getAllInternal is implemented.
+  virtual CSSStyleValueVector getAllInternal(AtomicString customPropertyName,
+                                             ExceptionState&) = 0;
 
   virtual HeapVector<StylePropertyMapEntry> getIterationEntries() = 0;
   IterationSource* startIteration(ScriptState*, ExceptionState&) override;