Bug 603095 Accept middle-click for new tab button. r=Neil sr=Neil.

suite/browser/navigator.xul

@@ -502,6 +502,7 @@
                     flex="1" contenttooltip="aHTMLTooltip"
                     contentcontextmenu="contentAreaContextMenu"
                     onnewtab="BrowserOpenTab();"
+                    onnewtabclick="checkForMiddleClick(this, event);"
                     autocompletepopup="PopupAutoComplete"
                     onbookmarkgroup="addGroupmarkAs();"
                     onclick="return contentAreaClick(event);"

suite/browser/tabbrowser.xml

@@ -107,7 +107,7 @@
                     tooltiptextclose="&closeTabButton.tooltip;"
                     setfocus="false"
                     onclick="this.parentNode.parentNode.parentNode.onTabClick(event);"
-                    xbl:inherits="onnewtab"
+                    xbl:inherits="onnewtab,onnewtabclick"
                     onclosetab="var node = this.parentNode;
                                 while (node.localName != 'tabbrowser')
                                   node = node.parentNode;
@@ -2766,7 +2766,7 @@
           <xul:hbox>
             <xul:stack>
               <xul:spacer class="tabs-left"/>
-              <xul:toolbarbutton class="tabs-newbutton" xbl:inherits="oncommand=onnewtab,tooltiptext=tooltiptextnew"/>
+              <xul:toolbarbutton class="tabs-newbutton" xbl:inherits="oncommand=onnewtab,onclick=onnewtabclick,tooltiptext=tooltiptextnew"/>
             </xul:stack>
             <xul:hbox flex="1" style="min-width: 1px; overflow: -moz-hidden-unscrollable;">
               <children/>