Fix Tab constructor

For some reason, the constructor arguments are flipped.
Flip them so they make sense.

BUG=415747

Review URL: https://codereview.chromium.org/671353002

Cr-Commit-Position: refs/heads/master@{#301146}

chrome/android/java/src/org/chromium/chrome/browser/Tab.java

@@ -338,7 +338,7 @@ public class Tab {
      * @param window    An instance of a {@link WindowAndroid}.
      */
     public Tab(int id, boolean incognito, Context context, WindowAndroid window) {
-        this(INVALID_TAB_ID, id, incognito, context, window);
+        this(id, INVALID_TAB_ID, incognito, context, window);
     }
 
     /**