Update navigator.ink.requestPresenter() to use a dictionary param

requestPresenter took in two params, a String |type| and an Element
|presentationArea|. The goal of the |type| param was to enable
requestPresenter() to be easily extensible in the future for other types
of presenters.

However, in its current state, it is a no-op param. For this reason,
after some discussion ([1], [2], [3]) it has been decided that the API
should be updated to instead just use a dictionary param. This will
still be easily extensible in the future, but won't require a string
param until then.

[1]: WICG/ink-enhancement#20
[2]: w3ctag/design-reviews#473 (comment)
[3]: https://groups.google.com/a/chromium.org/g/blink-dev/c/ZtqwKR_HIAE

Bug: 1052145
Change-Id: I9ef18a04ab150fff8c8f173bfa209e10d90781f3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3027884
Reviewed-by: Daniel Libby <dlibby@microsoft.com>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Commit-Queue: Mario Bianucci <mabian@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#902434}

delegated-ink/exception-thrown-bad-color.tentative.html

@@ -8,7 +8,7 @@
 <canvas id="canvas"></canvas>
 <script>
   promise_test(async (t) => {
-    const presenter = await navigator.ink.requestPresenter('delegated-ink-trail', canvas);
+    const presenter = await navigator.ink.requestPresenter({presentationArea: canvas});
     const style = { color: "bad-color", diameter: 6 };
 
     canvas.addEventListener("pointermove", evt => {

delegated-ink/exception-thrown-diameter-less-than-or-equal-to-0.tentative.html

@@ -9,7 +9,7 @@
 <script>
   function RunTest(d, move) {
     promise_test(async (t) => {
-      const presenter = await navigator.ink.requestPresenter('delegated-ink-trail', canvas);
+      const presenter = await navigator.ink.requestPresenter({presentationArea: canvas});
       const style = { color: "green", diameter: d };
 
       canvas.addEventListener("pointermove", evt => {

delegated-ink/exception-thrown-untrusted-event.tentative.window.js

@@ -1,4 +1,4 @@
-let presenter = navigator.ink.requestPresenter('delegated-ink-trail');
+let presenter = navigator.ink.requestPresenter();
 let style = { color: "red", diameter: 3 };
 let evt = new PointerEvent("pointerdown", {clientX: 10, clientY: 10});
 presenter.then( function(p) {

delegated-ink/requestPresenter-returns-valid-promise.tentative.window.js

@@ -3,9 +3,21 @@ test(() => {
 }, "navigator needs to support ink to run this test.");
 
 promise_test(t => {
-  return promise_rejects_js(t, TypeError, navigator.ink.requestPresenter('bad-type'));
-}, "Receive rejected promise for a bad type.");
+  return promise_rejects_js(t, TypeError, navigator.ink.requestPresenter('invalid-param'));
+}, "Receive rejected promise for an invalid param.");
 
 promise_test(() => {
-  return navigator.ink.requestPresenter('delegated-ink-trail');
-}, "Received fulfilled promise for a good type.");
+  return navigator.ink.requestPresenter();
+}, "Received fulfilled promise for no param");
+
+promise_test(() => {
+  return navigator.ink.requestPresenter(null);
+}, "Received fulfilled promise for null param");
+
+promise_test(() => {
+  return navigator.ink.requestPresenter({});
+}, "Received fulfilled promise for empty dictionary param");
+
+promise_test(() => {
+  return navigator.ink.requestPresenter({presentationArea: null});
+}, "Received fulfilled promise for dictionary param with valid element.");