Enable Origin Trial for the Wake Lock API

This change configures the WakeLock feature as an Origin Trial. Since
the Origin Trial and Runtime Feature infrastructure has been merged
generation of feature_policy_helper.cc needs to depend on
runtime_enabled_features.json5 to avoid incremental build failures.

Bug: 257511
Change-Id: Ifd8ad0053b88b6701bb5ba3e58a93490fef49d48
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1797825Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695787}

third_party/blink/renderer/core/BUILD.gn

@@ -869,6 +869,7 @@ blink_python_runner("make_core_generated_feature_policy_helper") {
   inputs = scripts_for_json5_files + [
              "../build/scripts/make_feature_policy_helper.py",
              "./feature_policy/feature_policy_features.json5",
+             "../platform/runtime_enabled_features.json5",
              "../build/scripts/templates/feature_policy_helper.cc.tmpl",
            ]
   outputs = [

third_party/blink/renderer/modules/permissions/permissions.cc

@@ -149,7 +149,8 @@ PermissionDescriptorPtr ParsePermission(ScriptState* script_state,
     return CreatePermissionDescriptor(PermissionName::PERIODIC_BACKGROUND_SYNC);
   }
   if (name == "wake-lock") {
-    if (!RuntimeEnabledFeatures::WakeLockEnabled()) {
+    if (!RuntimeEnabledFeatures::WakeLockEnabled(
+            ExecutionContext::From(script_state))) {
       exception_state.ThrowTypeError("Wake Lock is not enabled.");
       return nullptr;
     }

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -1702,6 +1702,7 @@
     },
     {
       name: "WakeLock",
+      origin_trial_feature_name: "WakeLock",
       status: "experimental",
     },
     {