Bug 1676760 - Always use vsync priority for the ParentProcessVsyncNotifier runnable. r=smaug

This check was there for single process Android and is no longer needed.

Differential Revision: https://phabricator.services.mozilla.com/D139765

layout/base/nsRefreshDriver.cpp

@@ -507,23 +507,18 @@ class VsyncRefreshDriverTimer : public RefreshDriverTimer {
 
       NS_IMETHOD Run() override {
         MOZ_ASSERT(NS_IsMainThread());
-        sVsyncPriorityEnabled = mozilla::BrowserTabsRemoteAutostart();
-
         mObserver->NotifyVsyncOnMainThread();
         return NS_OK;
       }
 
       NS_IMETHOD GetPriority(uint32_t* aPriority) override {
-        *aPriority = sVsyncPriorityEnabled
-                         ? nsIRunnablePriority::PRIORITY_VSYNC
-                         : nsIRunnablePriority::PRIORITY_NORMAL;
+        *aPriority = nsIRunnablePriority::PRIORITY_VSYNC;
         return NS_OK;
       }
 
      private:
       ~ParentProcessVsyncNotifier() = default;
       RefPtr<RefreshDriverVsyncObserver> mObserver;
-      static mozilla::Atomic<bool> sVsyncPriorityEnabled;
     };
 
     bool NotifyVsync(const VsyncEvent& aVsync) override {
@@ -833,9 +828,6 @@ NS_IMPL_ISUPPORTS_INHERITED(
         ParentProcessVsyncNotifier,
     Runnable, nsIRunnablePriority)
 
-mozilla::Atomic<bool> VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::
-    ParentProcessVsyncNotifier::sVsyncPriorityEnabled(false);
-
 /**
  * Since the content process takes some time to setup
  * the vsync IPC connection, this timer is used