Make ComputedStyleBase a templated class to allow it to use functions on ComputedStyle

third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp

Index: third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
diff --git a/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp b/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
index 329a5db96f9d4a8d6cf215ffb3ec8416d44c3109..0d076f77f864f22186e8ab3d70980b339d744bd5 100644
--- a/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
+++ b/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
@@ -695,8 +695,8 @@ PassRefPtr<ComputedStyle> StyleResolver::StyleForElement(
       RefPtr<ComputedStyle> style = ComputedStyle::Create();
       style->InheritFrom(*state.ParentStyle(),
                          IsAtShadowBoundary(element)
-                             ? ComputedStyleBase::kAtShadowBoundary
-                             : ComputedStyleBase::kNotAtShadowBoundary);
+                             ? ComputedStyle::kAtShadowBoundary
+                             : ComputedStyle::kNotAtShadowBoundary);
       state.SetStyle(std::move(style));
     } else {
       state.SetStyle(InitialStyleForElement());