Revert of Remove prefixed Pointer Lock API.

LayoutTests/pointer-lock/locked-element-iframe-removed-from-dom-prefixed-expected.txt

Index: LayoutTests/pointer-lock/locked-element-iframe-removed-from-dom-prefixed-expected.txt
diff --git a/LayoutTests/pointer-lock/locked-element-iframe-removed-from-dom-prefixed-expected.txt b/LayoutTests/pointer-lock/locked-element-iframe-removed-from-dom-prefixed-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c9da65caa8fb21f73e9dbd433b436b3d9543b3e3
--- /dev/null
+++ b/LayoutTests/pointer-lock/locked-element-iframe-removed-from-dom-prefixed-expected.txt
@@ -0,0 +1,18 @@
+Test removing an iframe containing a locked element causes lock to be released.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+     Lock target in iframe. (main document handler)
+     Lock target in iframe. (iframe handler)
+PASS onwebkitpointerlockchange received after: Lock target in iframe. (iframe handler)
+PASS targetIframe1.contentDocument.webkitPointerLockElement is targetDiv1
+PASS targetDiv1.parentElement.parentElement is targetIframe1.contentDocument.body
+     Remove iframe & immediately lock target2. (main document handler)
+     Remove iframe & immediately lock target2. (iframe handler)
+PASS document.webkitPointerLockElement is null
+PASS onwebkitpointerlockchange received after: Remove iframe & immediately lock target2. (main document handler)
+PASS successfullyParsed is true
+
+TEST COMPLETE
+