Fixes issue #3314; adds a constructor overload for PushButton(Image, Image, ClickHandler).

Review by: ecc (TRB)

git-svn-id: https://google-web-toolkit.googlecode.com/svn/releases/1.6@4641 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/user/src/com/google/gwt/user/client/ui/PushButton.java b/user/src/com/google/gwt/user/client/ui/PushButton.java
index 3872d11..daad75d 100644
--- a/user/src/com/google/gwt/user/client/ui/PushButton.java
+++ b/user/src/com/google/gwt/user/client/ui/PushButton.java
@@ -96,6 +96,17 @@
    * 
    * @param upImage image for the default(up) face of the button
    * @param downImage image for the down face of the button
+   * @param handler the click handler
+   */
+  public PushButton(Image upImage, Image downImage, ClickHandler handler) {
+    super(upImage, downImage, handler);
+  }
+
+  /**
+   * Constructor for <code>PushButton</code>.
+   * 
+   * @param upImage image for the default(up) face of the button
+   * @param downImage image for the down face of the button
    * @param listener clickListener
    */
   @Deprecated