Refactor code generation to allow us to diff generic expressions and not just fields

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
new file mode 100644
index 0000000000000000000000000000000000000000..0d2ef6913d53b8e0061ae8b055f8e58994dbf14f
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/ComputedStyleDiffFunctions.json5
@@ -0,0 +1,33 @@
+{
+// 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.
+
+    // The fields that need to be diffed.
+    fields: {
+    },
+
+    // A map of expressions to diff (these can be public getters of fields or 
+    // functions that use fields to determine a value).
+    // TODO: Not implemented for now.
+    map_of_expressions: {
+      default: {},
+    },
+
+  },
+  data: [
+    {
+        name: "ScrollAnchorDisablingPropertyChanged",
+        fields: ["margin-top", "margin-left", "margin-right", "margin-bottom", 
+                  "left", "right", "top", "bottom", "padding-top", 
+                  "padding-left", "padding-right", "padding-bottom"]
+    },
+    {
+        name: "DiffNeedsFullLayoutAndPaintInvalidation",
+        fields: ["padding-top", "padding-left", "padding-right", 
+                "padding-bottom"]
+    }
+  ],
+}