Remove support for the keygen tag

content/browser/accessibility/dump_accessibility_tree_browsertest.cc

Index: content/browser/accessibility/dump_accessibility_tree_browsertest.cc
diff --git a/content/browser/accessibility/dump_accessibility_tree_browsertest.cc b/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
index 170b81507fc52f62ca82726e8f7bb18c51806b57..766f2012dba7a9f1c7ef45b9bbf1c8a72eca8378 100644
--- a/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
+++ b/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
@@ -1136,10 +1136,6 @@ IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityIns) {
   RunHtmlTest(FILE_PATH_LITERAL("ins.html"));
 }
 
-IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityKeygen) {
-  RunHtmlTest(FILE_PATH_LITERAL("keygen.html"));
-}
-
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityLabel) {
   RunHtmlTest(FILE_PATH_LITERAL("label.html"));
 }