Making Observable.synchronize an instance method rather than static

Author: benjchristensen

language-adaptors/rxjava-scala/src/main/scala/rx/lang/scala/Observable.scala

@@ -176,7 +176,7 @@ class Observable[+T](val asJava: rx.Observable[_ <: T])
    *         Observable, and that synchronously notifies its {@link Observer}s
    */
   def synchronize: Observable[T] = {
-    Observable[T](JObservable.synchronize(asJava))
+    Observable[T](asJava.synchronize)
   }
 
   /**

rxjava-core/src/main/java/rx/Observable.java

@@ -1783,6 +1783,13 @@ public Observable<T> synchronize() {
         return create(OperationSynchronize.synchronize(this));
     }
 
+    /**
+     * @deprecated Replaced with instance method. 
+     */
+    @Deprecated
+    public static <T> Observable<T> synchronize(Observable<T> source) {
+        return create(OperationSynchronize.synchronize(source));
+    }
 
     /**
      * Emits an item each time interval (containing a sequential number).