Add accel+0 to reset text zoom to 100%. bug=69565, r=Hixie, a=ben

suite/common/viewZoomOverlay.js

@@ -98,6 +98,10 @@ ZoomManager.prototype = {
     this.jump(-1);
   },
 
+  reset : function() {
+    this.textZoom = 100;
+  },
+
   getZoomFactors : function() {
     this.ensureZoomFactors();
 

suite/common/viewZoomOverlay.xul

@@ -52,11 +52,13 @@
     <key id="key_textZoomEnlarge" key="&textZoomEnlargeCmd.commandkey;"  observes="cmd_textZoomEnlarge" modifiers="accel"/>
     <key                          key="&textZoomEnlargeCmd.commandkey;"  observes="cmd_textZoomEnlarge" modifiers="accel,shift"/>
     <key                          key="&textZoomEnlargeCmd.commandkey2;" observes="cmd_textZoomEnlarge" modifiers="accel"/>
+    <key                          key="&textZoomResetCmd.commandkey;"    observes="cmd_textZoomReset"   modifiers="accel"/>
   </keyset>
 
   <broadcasterset id="broadcasterset">
     <broadcaster id="cmd_textZoomReduce"  oncommand="ZoomManager.prototype.getInstance().reduce();"/>
     <broadcaster id="cmd_textZoomEnlarge" oncommand="ZoomManager.prototype.getInstance().enlarge();"/>
+    <broadcaster id="cmd_textZoomReset"   oncommand="ZoomManager.prototype.getInstance().reset();"/>
   </broadcasterset>
 
   <menu id="menu_textZoom" accesskey="&textZoomMenu.accesskey;" hidden="true">

suite/locales/en-US/chrome/common/viewZoomOverlay.dtd

@@ -7,6 +7,8 @@
 <!ENTITY textZoomReduceCmd.accesskey    "m">
 <!ENTITY textZoomReduceCmd.commandkey   "-">
 
+<!ENTITY textZoomResetCmd.commandkey    "0">
+
 <!-- see textZoomOtherLabel in navigator.properties -->
 <!ENTITY textZoomMenu.accesskey         "z">
 <!ENTITY textZoomOtherCmd.accesskey     "o">