Add macro to diff the groups (and their members) in ComputedStyleBase

third_party/WebKit/Source/build/scripts/templates/ComputedStyleBase.h.tmpl

Index: third_party/WebKit/Source/build/scripts/templates/ComputedStyleBase.h.tmpl
diff --git a/third_party/WebKit/Source/build/scripts/templates/ComputedStyleBase.h.tmpl b/third_party/WebKit/Source/build/scripts/templates/ComputedStyleBase.h.tmpl
index 4d6e668571d57527382a82b3ec31ddd109fef4bb..132d20d7aaf153828e66ff770357787749094eda 100644
--- a/third_party/WebKit/Source/build/scripts/templates/ComputedStyleBase.h.tmpl
+++ b/third_party/WebKit/Source/build/scripts/templates/ComputedStyleBase.h.tmpl
@@ -9,6 +9,7 @@
 #include "core/style/ComputedStyleConstants.h"
 #include "core/CoreExport.h"
 #include "core/style/DataRef.h"
+#include "core/style/StyleDifference.h"
 {% for path in include_paths %}
 #include "{{path}}"
 {% endfor %}
@@ -84,6 +85,10 @@ class CORE_EXPORT ComputedStyleBase {
                    IsAtShadowBoundary isAtShadowBoundary = kNotAtShadowBoundary);
 
   void CopyNonInheritedFromCached(const ComputedStyleBase& other);
+  bool DiffNeedsFullLayoutAndPaintInvalidation(
+      const ComputedStyleBase& other) const;
+  bool ScrollAnchorDisablingPropertyChanged(const ComputedStyleBase& other,
+                                            const StyleDifference&) const;
 
   // Copies the values of any independent inherited properties from the parent
   // style that are marked as inherited by this style.