Bug 579208 - Sizes of some XUL elements changes when lightweight themes are applied. r=dao

--HG--
extra : rebase_source : f2276fef3f0e0be1cc245a3d889ee396f3d45515

toolkit/themes/osx/global/toolbar.css

@@ -14,7 +14,7 @@ menubar:-moz-lwtheme,
 toolbar:-moz-lwtheme {
   -moz-appearance: none;
   background: none;
-  border-style: none;
+  border-color: transparent;
 }
 
 menubar {

toolkit/themes/windows/global/menu.css

@@ -127,7 +127,7 @@ menubar > menu[_moz-menuactive="true"][open="true"] {
 
 menubar > menu:-moz-lwtheme {
   -moz-appearance: none;
-  border-style: none;
+  border-color: transparent;
 }
 
 menubar > menu:-moz-lwtheme:not([disabled="true"]) {

toolkit/themes/windows/global/toolbar.css

@@ -43,7 +43,7 @@ toolbox:-moz-lwtheme,
 toolbar:-moz-lwtheme {
   -moz-appearance: none;
   background: none;
-  border-style: none;
+  border-color: transparent;
 }
 
 /* ::::: toolbar decorations ::::: */