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

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

 {
   // This file specifies the fields we want to diff in the various diff functions 
   // in ComputedStyle.
 
   parameters: {
     // The name parameter represents the name of the function to be created.
 
     fields_to_diff: {
       default: [],
     },
@@ skipping 321 matching lines @@
             field_dependencies: ["border-image"]
           },
         ]
     },
     {
         name: "UpdatePropertySpecificDifferencesBackdropFilter",
         fields_to_diff: ["BackdropFilter"],
     },
     {
         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"]
           },
           {
             method: "TextStrokeColor()",
             field_dependencies: ["-webkit-text-stroke-color"]
           },
           {
             method: "TextEmphasisColor()",
             field_dependencies: ["-webkit-text-emphasis-color"]
@@ skipping 15 matching lines @@
             field_dependencies: ["caret-color"]
           },
           {
             method: "VisitedLinkCaretColor()",
             field_dependencies: ["VisitedLinkCaretColor"]
           },
         ]
     },
   ],
 }