CSS: serialize pointer-events keywords in lower case

https://drafts.csswg.org/cssom/#serializing-css-values

"To serialize a CSS component value depends on the component, as follows:
keyword
The keyword converted to ASCII lowercase."

Bug: 901666
Change-Id: Iff579a363de13441c75bbebfc951095b071f6060
Reviewed-on: https://chromium-review.googlesource.com/c/1317300
Commit-Queue: Emil A Eklund <eae@chromium.org>
Reviewed-by: Eric Willigers <ericwilligers@chromium.org>
Reviewed-by: Emil A Eklund <eae@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605383}

third_party/WebKit/LayoutTests/external/wpt/css/css-typed-om/the-stylepropertymap/properties/pointer-events.html

@@ -15,9 +15,9 @@
 
 runPropertyTests('pointer-events', [
   { syntax: 'bounding-box' },
-  { syntax: 'visiblePainted' },
-  { syntax: 'visibleFill' },
-  { syntax: 'visibleStroke' },
+  { syntax: 'visiblepainted' },
+  { syntax: 'visiblefill' },
+  { syntax: 'visiblestroke' },
   { syntax: 'visible' },
   { syntax: 'painted' },
   { syntax: 'fill' },

third_party/WebKit/LayoutTests/fast/css/invalidation/independent-inheritance-fast-path.html

@@ -13,7 +13,7 @@
 // TODO(napper): Generate this table from CSSProperties.in.
 var independent_properties = [
     // [Property name, [list of valid keywords]]. Each keyword is tested in consecutive pairs.
-    ["pointerEvents", ["none", "auto", "stroke", "fill", "painted", "visible", "visibleStroke", "visibleFill", "visiblePainted", "bounding-box", "all"]],
+    ["pointerEvents", ["none", "auto", "stroke", "fill", "painted", "visible", "visiblestroke", "visiblefill", "visiblepainted", "bounding-box", "all"]],
     ["visibility", ["visible", "hidden", "collapse"]],
     ["whiteSpace", ["normal", "pre", "pre-wrap", "pre-line", "nowrap"]],
     ["borderCollapse", ["separate", "collapse"]],

third_party/blink/renderer/core/css/css_properties.json5

@@ -2522,8 +2522,8 @@
       inherited: true,
       field_template: "keyword",
       keywords: [
-        "none", "auto", "stroke", "fill", "painted", "visible", "visibleStroke",
-        "visibleFill", "visiblePainted", "bounding-box", "all"
+        "none", "auto", "stroke", "fill", "painted", "visible", "visiblestroke",
+        "visiblefill", "visiblepainted", "bounding-box", "all"
       ],
       typedom_types: ["Keyword"],
       default_value: "auto",

third_party/blink/renderer/core/css/css_value_keywords.json5

@@ -797,9 +797,9 @@
     //
     // pointer-events
     //
-    "visiblePainted",
-    "visibleFill",
-    "visibleStroke",
+    "visiblepainted",
+    "visiblefill",
+    "visiblestroke",
     //visible
     "painted",
     "fill",

third_party/blink/renderer/core/css/parser/css_parser_fast_paths.cc

@@ -665,7 +665,7 @@ bool CSSParserFastPaths::IsValidKeywordPropertyAndValue(
     case CSSPropertyPointerEvents:
       return value_id == CSSValueVisible || value_id == CSSValueNone ||
              value_id == CSSValueAll || value_id == CSSValueAuto ||
-             (value_id >= CSSValueVisiblePainted &&
+             (value_id >= CSSValueVisiblepainted &&
               value_id <= CSSValueBoundingBox);
     case CSSPropertyPosition:
       return value_id == CSSValueStatic || value_id == CSSValueRelative ||

third_party/blink/renderer/core/layout/pointer_events_hit_rules.cc

@@ -48,7 +48,7 @@ PointerEventsHitRules::PointerEventsHitRules(EHitTesting hit_testing,
       case EPointerEvents::kBoundingBox:
         can_hit_bounding_box = true;
         break;
-      case EPointerEvents::kVisiblePainted:
+      case EPointerEvents::kVisiblepainted:
       case EPointerEvents::kAuto:  // "auto" is like "visiblePainted" when in
                                    // SVG content
         require_fill = true;
@@ -59,11 +59,11 @@ PointerEventsHitRules::PointerEventsHitRules(EHitTesting hit_testing,
         can_hit_fill = true;
         can_hit_stroke = true;
         break;
-      case EPointerEvents::kVisibleFill:
+      case EPointerEvents::kVisiblefill:
         require_visible = true;
         can_hit_fill = true;
         break;
-      case EPointerEvents::kVisibleStroke:
+      case EPointerEvents::kVisiblestroke:
         require_visible = true;
         can_hit_stroke = true;
         break;
@@ -90,7 +90,7 @@ PointerEventsHitRules::PointerEventsHitRules(EHitTesting hit_testing,
       case EPointerEvents::kBoundingBox:
         can_hit_bounding_box = true;
         break;
-      case EPointerEvents::kVisiblePainted:
+      case EPointerEvents::kVisiblepainted:
       case EPointerEvents::kAuto:  // "auto" is like "visiblePainted" when in
                                    // SVG content
         require_visible = true;
@@ -99,8 +99,8 @@ PointerEventsHitRules::PointerEventsHitRules(EHitTesting hit_testing,
         can_hit_fill = true;
         can_hit_stroke = true;
         break;
-      case EPointerEvents::kVisibleFill:
-      case EPointerEvents::kVisibleStroke:
+      case EPointerEvents::kVisiblefill:
+      case EPointerEvents::kVisiblestroke:
       case EPointerEvents::kVisible:
         require_visible = true;
         can_hit_fill = true;