Bug 103452: When window.close() is called, close the tab for that content window, not the whole (XUL) window. r=hewitt, sr=jag, sr=jst

suite/browser/tabbrowser.xml

@@ -1128,6 +1128,20 @@
 
     <handlers>
       <handler event="keypress" modifiers="control" keycode="vk_f4" action="this.removeCurrentTab();"/>
+      <handler event="DOMWindowClose">
+        <![CDATA[
+          const browser = this.browsers;
+          if (browser.length == 1)
+            return;
+          var i = 0;
+          for (; i < browsers.length; ++i) {
+            if (browsers[i].contentWindow == event.target)
+              break;
+          }
+          this.removeTab(this.mTabContainer.childNodes[i]);
+          event.preventDefault();
+        ]]>
+      </handler>
     </handlers>
   </binding>