v8binding: Implement timers with IDL callback function of type Function

This is mostly a reland of Iee5c1d6917ad7770383e06a425f96000835a663a.

This patch implements setTimeout/setInterval Web APIs with IDL
callback function of type Function (i.e. V8Function in Blink).

Also ensure eager finalization of ScheduledAction in DOMTimer to
prevent a memory leak.

Bug: 866610
Change-Id: I3f460247f27069e4054a984efd3f98a2ce0ceac7
Reviewed-on: https://chromium-review.googlesource.com/c/1391248
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619125}

html/webappapis/dynamic-markup-insertion/opening-the-input-stream/resources/url-entry-document-timer-frame.html

@@ -0,0 +1,3 @@
+<script>
+setTimeout(parent.timerTest, 10);
+</script>

html/webappapis/dynamic-markup-insertion/opening-the-input-stream/url-entry-document.window.js

@@ -0,0 +1,18 @@
+async_test(t => {
+  const frame = document.body.appendChild(document.createElement("iframe"));
+  t.add_cleanup(() => frame.remove());
+  const frameURL = new URL("resources/url-entry-document-timer-frame.html", document.URL).href;
+  window.timerTest = t.step_func_done(() => {
+    assert_equals(frame.contentDocument.URL, frameURL);
+    assert_equals(frame.contentWindow.location.href, frameURL);
+
+    // In this case, the entry settings object was set when this function is
+    // executed in the timer task through Web IDL's "invoke a callback
+    // function" algorithm, to be the relevant settings object of this
+    // function. Therefore the URL of this document would be inherited.
+    assert_equals(frame.contentDocument.open(), frame.contentDocument);
+    assert_equals(frame.contentDocument.URL, document.URL);
+    assert_equals(frame.contentWindow.location.href, document.URL);
+  });
+  frame.src = frameURL;
+}, "document.open() changes document's URL to the entry settings object's responsible document's (through timeouts)");

lint.whitelist

@@ -167,6 +167,7 @@ SET TIMEOUT: html/semantics/embedded-content/the-img-element/*
 SET TIMEOUT: html/semantics/scripting-1/the-script-element/*
 SET TIMEOUT: html/webappapis/dynamic-markup-insertion/opening-the-input-stream/0*
 SET TIMEOUT: html/webappapis/dynamic-markup-insertion/opening-the-input-stream/resources/history-frame.html
+SET TIMEOUT: html/webappapis/dynamic-markup-insertion/opening-the-input-stream/resources/url-entry-document-timer-frame.html
 SET TIMEOUT: html/webappapis/dynamic-markup-insertion/opening-the-input-stream/tasks.window.js
 SET TIMEOUT: html/webappapis/scripting/event-loops/*
 SET TIMEOUT: html/webappapis/scripting/events/event-handler-processing-algorithm-error/*