[Smart Selection] Fix wrong icon in work profile

We want to set icon to null when shouldShowIcon() returns false for
primary action.

Bug: 869500, b/111806618
Change-Id: I44203568fb167899ab25fd5d2d3dff13f6723c46
Reviewed-on: https://chromium-review.googlesource.com/1157120Reviewed-by: Pedro Amaral <amaralp@chromium.org>
Commit-Queue: Shimi Zhang <ctzsm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579552}

content/public/android/java/src/org/chromium/content/browser/selection/AdditionalMenuItemProviderImpl.java

@@ -46,9 +46,11 @@ public class AdditionalMenuItemProviderImpl implements AdditionalMenuItemProvide
         if (count > 0) {
             RemoteAction primaryAction = classification.getActions().get(0);
 
+            MenuItem item = menu.findItem(android.R.id.textAssist);
             if (primaryAction.shouldShowIcon()) {
-                MenuItem item = menu.findItem(android.R.id.textAssist);
                 item.setIcon(primaryAction.getIcon().loadDrawable(context));
+            } else {
+                item.setIcon(null);
             }
         }