Re-enable Wake Lock Origin Trial

The Wake Lock feature was supposed to be in Origin Trial from Chrome 79
to 82 however Chrome 82 has been canceled due to COVID-19 and so we are
extending the OT through Chrome 83 to give us time to integrate recent
specification changes that missed the branch point.

Bug: 257511
Change-Id: I3df4ad65029b042eb8c9eada9bf7cae5f7cad4f6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2134400Reviewed-by: Alex Russell <slightlyoff@chromium.org>
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756387}

third_party/blink/renderer/modules/wake_lock/wake_lock.cc

@@ -56,7 +56,8 @@ ScriptPromise WakeLock::request(ScriptState* script_state,
   auto* context = ExecutionContext::From(script_state);
   DCHECK(context->IsDocument() || context->IsDedicatedWorkerGlobalScope());
 
-  if (type == "screen" && !RuntimeEnabledFeatures::ScreenWakeLockEnabled()) {
+  if (type == "screen" &&
+      !RuntimeEnabledFeatures::ScreenWakeLockEnabled(context)) {
     exception_state.ThrowTypeError(
         "The provided value 'screen' is not a valid enum value of type "
         "WakeLockType.");

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -1530,6 +1530,7 @@
     },
     {
       name: "ScreenWakeLock",
+      origin_trial_feature_name: "WakeLock",
       status: "experimental",
     },
     // WebSpeech API with both speech recognition and synthesis functionality
@@ -1812,6 +1813,7 @@
     },
     {
       name: "WakeLock",
+      origin_trial_feature_name: "WakeLock",
       implied_by: ['ScreenWakeLock', 'SystemWakeLock'],
     },
     {