compute pressure: Rename supportedSources to knownSources

Based on specification change [1], supportedSources attribute
is renamed to knownSources.

[1]: w3c/compute-pressure#268

Bug: 337837870
Change-Id: Ic80d0c806531ed99f8bc2c368f89e55427b0202c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5491092
Commit-Queue: Arnaud Mandy 
Reviewed-by: Reilly Grant 
Reviewed-by: Mike Taylor 
Cr-Commit-Position: refs/heads/main@{#1294408}

Author: arskama

compute-pressure/compute_pressure_supported_sources.https.any.js renamed to compute-pressure/compute_pressure_known_sources.https.any.js

@@ -4,18 +4,18 @@
 
 test(() => {
   // Compute Pressure should support at least "cpu"
-  const sources = PressureObserver.supportedSources;
+  const sources = PressureObserver.knownSources;
   assert_in_array('cpu', sources);
 }, 'PressureObserver should support at least "cpu"');
 
 test(() => {
   // Compute Pressure should be frozen array
-  const sources = PressureObserver.supportedSources;
-  assert_equals(sources, PressureObserver.supportedSources);
+  const sources = PressureObserver.knownSources;
+  assert_equals(sources, PressureObserver.knownSources);
 }, 'PressureObserver must return always the same array');
 
 test(() => {
   // Compute Pressure should be frozen array
-  let sources = PressureObserver.supportedSources;
-  assert_equals(Object.isFrozen(), true);
+  let sources = PressureObserver.knownSources;
+  assert_equals(Object.isFrozen(sources), true);
 }, 'PressureObserver must return a frozen array');

interfaces/compute-pressure.idl

@@ -21,7 +21,7 @@ interface PressureObserver {
   undefined disconnect();
   sequence takeRecords();
 
-  [SameObject] static readonly attribute FrozenArray supportedSources;
+  [SameObject] static readonly attribute FrozenArray knownSources;
 };
 
 [Exposed=(DedicatedWorker,SharedWorker,Window), SecureContext]