Remove support for the keygen tag

third_party/WebKit/LayoutTests/fast/forms/form-collection-radio-node-list-expected.txt

Index: third_party/WebKit/LayoutTests/fast/forms/form-collection-radio-node-list-expected.txt
diff --git a/third_party/WebKit/LayoutTests/fast/forms/form-collection-radio-node-list-expected.txt b/third_party/WebKit/LayoutTests/fast/forms/form-collection-radio-node-list-expected.txt
index 56a8b47b4e26fdd43c7ddf3b0b9b3def93781ca0..c14ac4beb06ebbd07a94ce08d61da35f39da9f48 100644
--- a/third_party/WebKit/LayoutTests/fast/forms/form-collection-radio-node-list-expected.txt
+++ b/third_party/WebKit/LayoutTests/fast/forms/form-collection-radio-node-list-expected.txt
@@ -1,4 +1,3 @@
-CONSOLE WARNING: The <keygen> element is deprecated and will be removed in M57, around March 2017. See https://www.chromestatus.com/features/5716060992962560 for more details.
 CONSOLE WARNING: line 1: The specified value "inputRadioValue" does not conform to the required format, "yyyy-MM-dd".
 This test is for RadioNodeList specified at http://www.whatwg.org/specs/web-apps/current-work/multipage/common-dom-interfaces.html#radionodelist
 
@@ -6,7 +5,7 @@ On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE
 
 
 
-PASS owner.elements.length is 23
+PASS owner.elements.length is 22
 PASS radioNodeList.length is 4
 PASS radioNodeList[0].value is 'searching'
 PASS radioNodeList[1].value is '123'
@@ -34,7 +33,7 @@ PASS radioNodeList[3].value is 'buttonValue'
 
 Check RadioNodeList is updated after adding a new element
 PASS container.appendChild(nonSubtreeElement); radioNodeList.length is 5
-PASS owner.elements.length is 24
+PASS owner.elements.length is 23
 PASS radioNodeList[4].value is 'non subtree element'
 
 Check RadioNodeList is updated after change in id, type and checked state of an element