compute pressure: Add OwnContributionEstimate to API.

This patch is the second part of the two patches patchset to
implement OnwContributionEstimate feature described in [1].

The first patch for crbug.com/402033762 addressed the
implementation-specific part, modifying //services and //content.

This patch exposes OwnContributionEstimate to Compute Pressure API.
The CDP has been also modified to also include a virtual estimate value.
Testdriver code was also modified to support estimate as a virtual
source input parameter.

[1] https://w3c.github.io/compute-pressure/?experimental=1#the-owncontributionestimate-attribute

Bug: 402033762
Change-Id: Ie4ff1294aea757700fb1cf6b5f22f18906867428
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6373001
Reviewed-by: Alex Rudenko <[email protected]>
Reviewed-by: Reilly Grant <[email protected]>
Reviewed-by: Koji Ishii <[email protected]>
Reviewed-by: Danil Somsikov <[email protected]>
Commit-Queue: Arnaud Mandy <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1460595}

Author: arskama

compute-pressure/compute_pressure_basic.https.window.js

@@ -31,14 +31,35 @@ pressure_test(async (t) => {
     const observer = new PressureObserver(resolve);
     t.add_cleanup(() => observer.disconnect());
     observer.observe('cpu').catch(reject);
-    update_virtual_pressure_source('cpu', 'critical').catch(reject);
+    update_virtual_pressure_source('cpu', 'critical', 0.5).catch(reject);
   });
   assert_equals(1, changes.length);
   assert_equals(changes[0].state, 'critical');
   assert_equals(changes[0].source, 'cpu');
   assert_equals(typeof changes[0].time, 'number');
+  assert_equals(typeof changes[0].ownContributionEstimate, 'number');
+  assert_equals(changes[0].ownContributionEstimate, 0.5);
 }, 'Basic functionality test');
 
+pressure_test(async (t) => {
+  await create_virtual_pressure_source('cpu');
+  t.add_cleanup(async () => {
+    await remove_virtual_pressure_source('cpu');
+  });
+
+  const changes = await new Promise((resolve, reject) => {
+    const observer = new PressureObserver(resolve);
+    t.add_cleanup(() => observer.disconnect());
+    observer.observe('cpu').catch(reject);
+    update_virtual_pressure_source('cpu', 'critical').catch(reject);
+  });
+  assert_equals(1, changes.length);
+  assert_equals(changes[0].state, 'critical');
+  assert_equals(changes[0].source, 'cpu');
+  assert_equals(typeof changes[0].time, 'number');
+  assert_equals(changes[0].ownContributionEstimate, null);
+}, 'Basic functionality test with no ownContributionEstimate');
+
 pressure_test(async (t) => {
   await create_virtual_pressure_source('cpu');
   t.add_cleanup(async () => {

compute-pressure/compute_pressure_duplicate_updates.https.window.js

@@ -19,15 +19,15 @@ pressure_test(async (t) => {
   const syncObserver = new SyncPressureObserver(t);
   await syncObserver.observer().observe('cpu');
 
-  await update_virtual_pressure_source('cpu', 'critical');
+  await update_virtual_pressure_source('cpu', 'critical', 0.2);
   await syncObserver.waitForUpdate();
   assert_equals(syncObserver.changes()[0][0].state, 'critical');
 
-  await update_virtual_pressure_source('cpu', 'critical');
+  await update_virtual_pressure_source('cpu', 'critical', 0.2);
   await new Promise(resolve => {t.step_timeout(resolve, 3000)});
   assert_equals(syncObserver.changes().length, 1);
 
-  await update_virtual_pressure_source('cpu', 'nominal');
+  await update_virtual_pressure_source('cpu', 'nominal'), 0.2;
   await syncObserver.waitForUpdate();
   assert_equals(syncObserver.changes()[1][0].state, 'nominal');
 

compute-pressure/resources/worker-support.js

@@ -43,8 +43,8 @@ function remove_virtual_pressure_source(source) {
   return send_message({command: 'remove', params: [source]});
 }
 
-function update_virtual_pressure_source(source, state) {
-  return send_message({command: 'update', params: [source, state]});
+function update_virtual_pressure_source(source, state, estimate) {
+  return send_message({command: 'update', params: [source, state, estimate]});
 }
 
 const uuid = new URLSearchParams(location.search).get('uuid');