Added Chip#getPrefixIcon().

Author: kevzlou7979

gwt-material/src/main/java/gwt/material/design/client/ui/MaterialChip.java

@@ -327,6 +327,10 @@ public Span getChipLabel() {
         return chipLabel;
     }
 
+    public MaterialIcon getPrefixIcon() {
+        return prefixIcon;
+    }
+
     @Override
     public HandlerRegistration addCloseHandler(CloseHandler closeHandler) {
         return addHandler(closeHandler, CloseEvent.getType());

gwt-material/src/main/java/gwt/material/design/client/ui/MaterialChipContainer.java

@@ -68,6 +68,12 @@ protected void add(Widget child, Element container) {
                     toggle(chip);
                 }
             }));
+            MaterialIcon icon = chip.getPrefixIcon();
+            icon.registerHandler(icon.addClickHandler(clickEvent -> {
+                if (isEnableToggle()) {
+                    setActive(chip, false);
+                }
+            }));
             chip.registerHandler(chip.addKeyUpHandler((event) -> {
                 if (event.getNativeKeyCode() == 13) {
                     toggle(chip);