Remove references to groups directly stored on ComputedStyle in .cpp file

third_party/WebKit/Source/core/css/ComputedStyleDiffFunctions.json5

Index: third_party/WebKit/Source/core/css/ComputedStyleDiffFunctions.json5
diff --git a/third_party/WebKit/Source/core/css/ComputedStyleDiffFunctions.json5 b/third_party/WebKit/Source/core/css/ComputedStyleDiffFunctions.json5
index 32fc5f60cb310c2ba3f2fb67bcdbcdd1387de457..162ba6785edfc08d9e477eeb7a121226fa76e596 100644
--- a/third_party/WebKit/Source/core/css/ComputedStyleDiffFunctions.json5
+++ b/third_party/WebKit/Source/core/css/ComputedStyleDiffFunctions.json5
@@ -335,10 +335,15 @@
     },
     {
         name: "UpdatePropertySpecificDifferencesTextDecorationOrColor",
-        fields_to_diff: ["text-decoration-style", "text-decoration-color",
-        "VisitedLinkTextDecorationColor", "TextEmphasisFill",
-        "text-underline-position", "text-decoration-skip", "AppliedTextDecorations"],
+        fields_to_diff: ["color", "VisitedLinkColor", "TextDecoration",
+                "text-decoration-style", "text-decoration-color",
+                "VisitedLinkTextDecorationColor", "TextEmphasisFill",
+                "text-underline-position", "text-decoration-skip", "AppliedTextDecorations"],
         methods_to_diff: [
+          {
+            method: "HasSimpleUnderlineInternal()",
+            field_dependencies: ["HasSimpleUnderline"]
+          },
           {
             method: "TextFillColor()",
             field_dependencies: ["-webkit-text-fill-color"]