Support a negation pseudo-class, :not(), in <content select>

LayoutTests/fast/dom/shadow/content-selector-query.html

Index: LayoutTests/fast/dom/shadow/content-selector-query.html
diff --git a/LayoutTests/fast/dom/shadow/content-selector-query.html b/LayoutTests/fast/dom/shadow/content-selector-query.html
index f9d7f70abc1bc41ecc6fb381212c1d26075ca50b..11c4010888c1b254e86a6c0b672251c1a654aa4a 100644
--- a/LayoutTests/fast/dom/shadow/content-selector-query.html
+++ b/LayoutTests/fast/dom/shadow/content-selector-query.html
@@ -33,18 +33,49 @@ var dataOfValidCases = [
     'div[title]', 'div[class="example"]', 'div[hello="Cleveland"][goodbye="Columbus"]',
     'div[rel~="copyright"]', 'div[href="http://www.example.com/"]',
     'div[hreflang|="en"]', 'div[character=romeo]',
+    'div, div', ' div,      div     ',
+    'div:not(div)',
+];
+
+var dataOfInvalidCases = [
+    'div div', 'div > div', 'div + div', 'div ~ div',
+    'div:root', 'div:lang(en)',
+    'div::before', 'div::after', 'div::first-line', 'div::first-letter',
+    'div:active', 'div:hover', 'div:focus',
+    'div div:not(div)', 'div:not(div) div', 'div span div',
+    'div < div', 'div - dvi', '< div', '+div', '~div', 'div:!', '!:!', 'div::!', 'div::first_of_type',
+    'pe;ro', '@screen', '@import "style.css"', 'div :first-of-type', 'div::first-of-type',
+    ' div, ,div', 'div \'\'',
     'div:link', 'div:visited', 'div:target', 'div:enabled', 'div:checked',
     'div:indeterminate', 'div:nth-child(1)', 'div:nth-last-child(1)', 'div:nth-of-type(1)',
     'div:nth-last-of-type(1)', 'div:first-child', 'div:last-child', 'div:first-of-type',
     'div:last-of-type', 'div:only-of-type',
     'div:first-of-type:last-of-type', 'div.elem:visited', '*:visited',
-    'div, div', 'div:first-of-type, div', 'div, div:first-of-type', 'div:first-of-type, div:last-of-type',
-    ' div,      div     ',
+    'div:first-of-type, div', 'div, div:first-of-type', 'div:first-of-type, div:last-of-type',
 ];
 
-var dataOfInvalidCases = [
+var dataOfValidCasesIfPseudoClassIsAllowed = [
+    null, '',
+    'ns|div', '*|div', '|div', 'div',
+    'ns|*', '*|*', '|*', '*',
+    '.elem', 'p.elem', 'foo.elem', '*.right',
+    '#elem', 'p#elem', 'foo#elem', '*#something',
+    'div[title]', 'div[class="example"]', 'div[hello="Cleveland"][goodbye="Columbus"]',
+    'div[rel~="copyright"]', 'div[href="http://www.example.com/"]',
+    'div[hreflang|="en"]', 'div[character=romeo]',
+    'div:link', 'div:visited', 'div:target', 'div:enabled', 'div:checked',
+    'div:indeterminate', 'div:nth-child(1)', 'div:nth-last-child(1)', 'div:nth-of-type(1)',
+    'div:nth-last-of-type(1)', 'div:first-child', 'div:last-child', 'div:first-of-type',
+    'div:last-of-type', 'div:only-of-type',
+    'div:first-of-type:last-of-type', 'div.elem:visited', '*:visited',
+    'div:first-of-type, div', 'div, div:first-of-type', 'div:first-of-type, div:last-of-type',
+    'div, div', ' div,      div     ',
+    'div:not(div)',
+];
+
+var dataOfInvalidCasesIfPseudoClassIsAllowed = [
     'div div', 'div > div', 'div + div', 'div ~ div',
-    'div:not(div)', 'div:root', 'div:lang(en)',
+    'div:root', 'div:lang(en)',
     'div::before', 'div::after', 'div::first-line', 'div::first-letter',
     'div:active', 'div:hover', 'div:focus',
     'div div:not(div)', 'div:not(div) div', 'div span div',
@@ -60,11 +91,24 @@ function doTest() {
 
     testRunner.dumpAsText();
 
+    if (window.internals) {
+        internals.settings.setPseudoClassesInMatchingCriteriaInAuthorShadowTreesEnabled(false);
+    }
     for (var i = 0; i < dataOfValidCases.length; ++i) {
-         test(dataOfValidCases[i], true);
+        test(dataOfValidCases[i], true);
     }
     for (var i = 0; i < dataOfInvalidCases.length; ++i) {
-         test(dataOfInvalidCases[i], false);
+        test(dataOfInvalidCases[i], false);
+    }
+
+    if (window.internals) {
+        internals.settings.setPseudoClassesInMatchingCriteriaInAuthorShadowTreesEnabled(true);
+    }
+    for (var i = 0; i < dataOfValidCasesIfPseudoClassIsAllowed.length; ++i) {
+        test(dataOfValidCases[i], true);
+    }
+    for (var i = 0; i < dataOfInvalidCasesIfPseudoClassIsAllowed.length; ++i) {
+        test(dataOfInvalidCases[i], false);
     }
 }