Enable the accessibility audit for chrome://net-internals

chrome/test/data/webui/net_internals/net_internals_test.js

Index: chrome/test/data/webui/net_internals/net_internals_test.js
diff --git a/chrome/test/data/webui/net_internals/net_internals_test.js b/chrome/test/data/webui/net_internals/net_internals_test.js
index ff5421bad6eb71ab60e5133a720d01c6d3482082..b107e308fe683f6485dfa71c7a5909ad5475118d 100644
--- a/chrome/test/data/webui/net_internals/net_internals_test.js
+++ b/chrome/test/data/webui/net_internals/net_internals_test.js
@@ -56,6 +56,24 @@ var NetInternalsTest = (function() {
     isAsync: true,
 
     setUp: function() {
+      // Enforce accessibility auditing, but suppress some false positives.
+      this.accessibilityIssuesAreErrors = true;
+      // False positive because a unicode character is used to draw a square.
+      // If it was actual text it'd be too low-contrast, but a square is fine.
+      this.accessibilityAuditConfig().ignoreSelectors(
+          'lowContrastElements', '#timeline-view-selection-ul label');
+      // Suppress this error; the black-on-gray button is readable.
+      this.accessibilityAuditConfig().ignoreSelectors(
+          'lowContrastElements', '#export-view-save-log-file');
+      // False positive because the background color highlights and then
+      // fades out with a transition when there's an error.
+      this.accessibilityAuditConfig().ignoreSelectors(
+          'lowContrastElements', '#hsts-view-query-output span');
+      // False positives for unknown reason.
+      this.accessibilityAuditConfig().ignoreSelectors(
+          'focusableElementNotVisibleAndNotAriaHidden',
+          '#hsts-view-tab-content *');
+
       // Wrap g_browser.receive around a test function so that assert and expect
       // functions can be called from observers.
       g_browser.receive =