Bug 1679314 - part1 : remove unused methods. r=smaug

No one is using `NewWakeLockOnBehalfOfProcess()` so we can remove it and its related methods.

Differential Revision: https://phabricator.services.mozilla.com/D99726

dom/power/PowerManagerService.cpp

@@ -135,14 +135,6 @@ PowerManagerService::NewWakeLock(const nsAString& aTopic,
   return NS_OK;
 }
 
-already_AddRefed<WakeLock> PowerManagerService::NewWakeLockOnBehalfOfProcess(
-    const nsAString& aTopic, ContentParent* aContentParent) {
-  RefPtr<WakeLock> wakelock = new WakeLock();
-  nsresult rv = wakelock->Init(aTopic, aContentParent);
-  NS_ENSURE_SUCCESS(rv, nullptr);
-  return wakelock.forget();
-}
-
 }  // namespace mozilla::dom::power
 
 NS_DEFINE_NAMED_CID(NS_POWERMANAGERSERVICE_CID);

dom/power/PowerManagerService.h

@@ -38,21 +38,6 @@ class PowerManagerService : public nsIPowerManagerService,
   // Implement WakeLockObserver
   void Notify(const hal::WakeLockInformation& aWakeLockInfo) override;
 
-  /**
-   * Acquire a wake lock on behalf of a given process (aContentParent).
-   *
-   * This method stands in contrast to nsIPowerManagerService::NewWakeLock,
-   * which acquires a wake lock on behalf of the /current/ process.
-   *
-   * NewWakeLockOnBehalfOfProcess is different from NewWakeLock in that
-   *
-   *  - The wake lock unlocks itself if the /given/ process dies, and
-   *  - The /given/ process shows up in WakeLockInfo::lockingProcesses.
-   *
-   */
-  already_AddRefed<WakeLock> NewWakeLockOnBehalfOfProcess(
-      const nsAString& aTopic, ContentParent* aContentParent);
-
   already_AddRefed<WakeLock> NewWakeLock(const nsAString& aTopic,
                                          nsPIDOMWindowInner* aWindow,
                                          mozilla::ErrorResult& aRv);

dom/power/WakeLock.cpp

@@ -67,29 +67,6 @@ nsresult WakeLock::Init(const nsAString& aTopic, nsPIDOMWindowInner* aWindow) {
   return NS_OK;
 }
 
-nsresult WakeLock::Init(const nsAString& aTopic,
-                        ContentParent* aContentParent) {
-  // Don't Init() a WakeLock twice.
-  MOZ_ASSERT(mTopic.IsEmpty());
-  MOZ_ASSERT(aContentParent);
-
-  if (aTopic.IsEmpty()) {
-    return NS_ERROR_INVALID_ARG;
-  }
-
-  mTopic.Assign(aTopic);
-  mContentParentID = aContentParent->ChildID();
-  mHidden = false;
-
-  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
-  if (obs) {
-    obs->AddObserver(this, "ipc:content-shutdown", /* ownsWeak */ true);
-  }
-
-  DoLock();
-  return NS_OK;
-}
-
 NS_IMETHODIMP
 WakeLock::Observe(nsISupports* aSubject, const char* aTopic,
                   const char16_t* data) {

dom/power/WakeLock.h

@@ -22,8 +22,6 @@ class ErrorResult;
 
 namespace dom {
 
-class ContentParent;
-
 class WakeLock final : public nsIDOMEventListener,
                        public nsIObserver,
                        public nsSupportsWeakReference,
@@ -47,11 +45,6 @@ class WakeLock final : public nsIDOMEventListener,
   // invisible.
   nsresult Init(const nsAString& aTopic, nsPIDOMWindowInner* aWindow);
 
-  // Initialize this wake lock on behalf of the given process.  If the process
-  // dies, the lock is released.  A wake lock initialized via this method is
-  // always considered visible.
-  nsresult Init(const nsAString& aTopic, ContentParent* aContentParent);
-
   // WebIDL methods
 
   nsPIDOMWindowInner* GetParentObject() const;