Bug 1619778 - Remove unused `GeckoThread#waitOnGecko` methods. r=geckoview-reviewers,aklotz

Differential Revision: https://phabricator.services.mozilla.com/D66584

--HG--
extra : moz-landing-system : lando

mobile/android/geckoview/src/main/java/org/mozilla/gecko/GeckoThread.java

@@ -643,22 +643,6 @@ public class GeckoThread extends Thread {
                              "speculativeConnectNative", uri);
     }
 
-    @WrapForJNI(stubName = "WaitOnGecko")
-    @RobocopTarget
-    private static native boolean nativeWaitOnGecko(long timeoutMillis);
-
-    public static void waitOnGeckoForever() {
-        nativeWaitOnGecko(0);
-    }
-
-    public static boolean waitOnGecko() {
-        return waitOnGecko(DEFAULT_TIMEOUT);
-    }
-
-    public static boolean waitOnGecko(final long timeoutMillis) {
-        return nativeWaitOnGecko(timeoutMillis);
-    }
-
     @WrapForJNI(stubName = "OnPause", dispatchTo = "gecko")
     private static native void nativeOnPause();
 

widget/android/nsAppShell.cpp

@@ -141,26 +141,6 @@ class GeckoThreadSupport final
     specConn->SpeculativeConnect(uri, principal, nullptr);
   }
 
-  static bool WaitOnGecko(int64_t timeoutMillis) {
-    struct NoOpRunnable : Runnable {
-      NoOpRunnable() : Runnable("NoOpRunnable") {}
-      NS_IMETHOD Run() override { return NS_OK; }
-    };
-
-    struct NoOpEvent : nsAppShell::Event {
-      void Run() override {
-        // We cannot call NS_DispatchToMainThread from within
-        // WaitOnGecko itself because the thread that is calling
-        // WaitOnGecko may not be an nsThread, and may not be able to do
-        // a sync dispatch.
-        NS_DispatchToMainThread(do_AddRef(new NoOpRunnable()),
-                                NS_DISPATCH_SYNC);
-      }
-    };
-    return nsAppShell::SyncRunEvent(
-        NoOpEvent(), nullptr, TimeDuration::FromMilliseconds(timeoutMillis));
-  }
-
   static void OnPause() {
     MOZ_ASSERT(NS_IsMainThread());