Added suppress warnings for DOMImplStandard#dispatchEvent*

Change-Id: I8d817e79a4fd66c45b48b1e63cbe3955050becaf
(cherry picked from commit 78dd42b6ed094f51c592010d22412d6860d1e909)

user/src/com/google/gwt/user/client/impl/DOMImplMozilla.java

diff --git a/user/src/com/google/gwt/user/client/impl/DOMImplMozilla.java b/user/src/com/google/gwt/user/client/impl/DOMImplMozilla.java
index cb76d68..9441a9c 100644
--- a/user/src/com/google/gwt/user/client/impl/DOMImplMozilla.java
+++ b/user/src/com/google/gwt/user/client/impl/DOMImplMozilla.java
@@ -37,6 +37,7 @@
     sinkEventsMozilla(elem, bits);
   }
 
+  @SuppressWarnings("deprecation")
   public native void sinkEventsMozilla(Element elem, int bits) /*-{
     if (bits & 0x20000) {
       elem.addEventListener('DOMMouseScroll', @com.google.gwt.user.client.impl.DOMImplStandard::dispatchEvent, false);

user/src/com/google/gwt/user/client/impl/DOMImplStandard.java

diff --git a/user/src/com/google/gwt/user/client/impl/DOMImplStandard.java b/user/src/com/google/gwt/user/client/impl/DOMImplStandard.java
index f4fb29a..bbf1f39 100644
--- a/user/src/com/google/gwt/user/client/impl/DOMImplStandard.java
+++ b/user/src/com/google/gwt/user/client/impl/DOMImplStandard.java
@@ -217,6 +217,7 @@
     sinkEventsImpl(elem, bits);
   }
 
+  @SuppressWarnings("deprecation")
   @Override
   protected native void initEventSystem() /*-{
     // Ensure $entry for bitfull event dispatchers
@@ -254,6 +255,7 @@
     elem.addEventListener(eventTypeName, dispatcher, false);
   }-*/;
 
+  @SuppressWarnings("deprecation")
   protected native void sinkEventsImpl(Element elem, int bits) /*-{
     var chMask = (elem.__eventBits || 0) ^ bits;
     elem.__eventBits = bits;