Generate StyleVisualData in ComputedStyleBase.

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

Index: third_party/WebKit/Source/core/css/CSSProperties.json5
diff --git a/third_party/WebKit/Source/core/css/CSSProperties.json5 b/third_party/WebKit/Source/core/css/CSSProperties.json5
index 3df68f37636cd70ea447a3de8869e14296ff2103..efd12d516deaec5910824da01ca04975fd15257b 100644
--- a/third_party/WebKit/Source/core/css/CSSProperties.json5
+++ b/third_party/WebKit/Source/core/css/CSSProperties.json5
@@ -543,6 +543,10 @@
       custom_all: true,
       is_descriptor: true,
       priority: "High",
+      field_template: "storage_only",
+      type_name: "float",
+      default_value: "1.0",
+      field_group: "visual",
     },
 
     {
@@ -878,6 +882,10 @@
       converter: "ConvertClip",
       custom_all: true,
       interpolable: true,
+      field_template: "storage_only",
+      field_type_path: "platform/LengthBox",
+      default_value: "LengthBox()",
+      field_group: "visual",
     },
     {
       name: "clip-path",