Create Document exitPointerLock and pointerLockElement API methods.

LayoutTests/http/tests/pointer-lock/requestPointerLock-can-not-transfer-between-documents.html

Index: LayoutTests/http/tests/pointer-lock/requestPointerLock-can-not-transfer-between-documents.html
diff --git a/LayoutTests/http/tests/pointer-lock/requestPointerLock-can-not-transfer-between-documents.html b/LayoutTests/http/tests/pointer-lock/requestPointerLock-can-not-transfer-between-documents.html
index 003e6b2c2eaf60aa979db5cca406951b4a03a137..d82b0716920792eaf2f1d19f3e9ea91b9364a832 100644
--- a/LayoutTests/http/tests/pointer-lock/requestPointerLock-can-not-transfer-between-documents.html
+++ b/LayoutTests/http/tests/pointer-lock/requestPointerLock-can-not-transfer-between-documents.html
@@ -19,15 +19,15 @@
     todo = [
       function () {
           expectOnlyChangeEvent("Lock targetDiv1.");
-          targetDiv1.webkitRequestPointerLock();
+          targetDiv1.requestPointerLock();
           // doNextStep called by event handler.
       },
       function () {
-          shouldBe("document.webkitPointerLockElement", "targetDiv1");
+          shouldBe("document.pointerLockElement", "targetDiv1");
           doNextStep();
       },
       function () {
-          iframe.contentWindow.postMessage(["eval", 'document.body.webkitRequestPointerLock()'], "*");
+          iframe.contentWindow.postMessage(["eval", 'document.body.requestPointerLock()'], "*");
           window.onmessage = function (messageEvent) {
               message = messageEvent.data;
               shouldBeEqualToString("message", "inner-iframe.html onpointerlockerror");
@@ -36,9 +36,9 @@
           }
       },
       function () {
-          iframe.contentWindow.postMessage(["eval", 'document.webkitExitPointerLock()'], "*");
+          iframe.contentWindow.postMessage(["eval", 'document.exitPointerLock()'], "*");
           window.onmessage = function (messageEvent) {
-              testFailed("webkitExitPointerLock from a document that doesn't have a lock caused an event " + messageEvent.data);
+              testFailed("exitPointerLock from a document that doesn't have a lock caused an event " + messageEvent.data);
               finishJSTest();
           }
           doNextStep();