Bug 1189995 - Move GeckoAppShell.pumpMessageLoop to GeckoThread; r=esawin

This method is used by Gecko to pump the Android message loop, and it's
also more suited to GeckoThread than GeckoAppShell.

mobile/android/base/GeckoAppShell.java

@@ -96,7 +96,6 @@ import android.os.Bundle;
 import android.os.Environment;
 import android.os.Handler;
 import android.os.Looper;
-import android.os.Message;
 import android.os.MessageQueue;
 import android.os.SystemClock;
 import android.os.Vibrator;
@@ -2451,24 +2450,6 @@ public class GeckoAppShell
         GeckoScreenOrientation.getInstance().unlock();
     }
 
-    @WrapForJNI
-    public static boolean pumpMessageLoop(final Message msg) {
-        final Handler geckoHandler = ThreadUtils.sGeckoHandler;
-
-        if (msg.obj == geckoHandler && msg.getTarget() == geckoHandler) {
-            // Our "queue is empty" message; see runGecko()
-            return false;
-        }
-
-        if (msg.getTarget() == null) {
-            Looper.myLooper().quit();
-        } else {
-            msg.getTarget().dispatchMessage(msg);
-        }
-
-        return true;
-    }
-
     @WrapForJNI
     public static void notifyWakeLockChanged(String topic, String state) {
         if (getGeckoInterface() != null)