Compute effective touch action in StyleAdjuster.

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

 {
 // This file specifies fields in ComputedStyle that we would like to
 // generate, but are not CSS properties.
 
   parameters: {
     // If true, we do not include this field in ComputedStyleBase::InheritFrom
     // and ComputedStyleBase::CopyNonInheritedFromCached.
     custom_copy: {
       default: false,
     },
@@ skipping 465 matching lines @@
     },
     {
       name: "HyphenationLimitLines",
       inherited: true,
       field_template: "storage_only",
       type_name: "short",
       default_value: "-1",
       field_group: "rare-inherited",
     },
     {
+      name: "EffectiveTouchAction",
+      inherited: true,
+      field_template: "storage_only",
+      include_paths: ["platform/graphics/TouchAction.h"],
+      type_name: "TouchAction",
+      default_value: "TouchAction::kTouchActionAuto",
+      field_group: "rare-inherited",

[shend, 2017/06/30 03:05:40]

Adding "field_size: 6" would pack the storage of this field as a bit field of
size 6 (6 is from [1]). This saves space and it also means that you won't need
to put TouchAction into the ALIGNMENT_ORDER list (see comment (A)).

[1]
https://cs.chromium.org/chromium/src/cc/input/touch_action.h?q=TouchAction&sq...

[sunxd, 2017/07/04 15:35:42]

Done.

+    },
+    {
       name: "TextEmphasisCustomMark",
       inherited: true,
       field_template: "external",
       type_name: "AtomicString",
       include_paths: ["platform/wtf/text/AtomicString.h"],
       default_value: "AtomicString()",
       field_group: "rare-inherited",
     },
     {
       name: "AppliedTextDecorations",
@@ skipping 453 matching lines @@
     {
       name: "GridAutoRepeatRowsType",
       field_template: "keyword",
       type_name: "AutoRepeatType",
       field_group: "rare-non-inherited->grid",
       keywords: ["no-auto-repeat", "auto-fill", "auto-fit"],
       default_value: "no-auto-repeat",
     },
   ],
 }