Add icon-visibility attribute to cr.ui.Tree.

chrome/browser/resources/shared/css/tree.css

Index: chrome/browser/resources/shared/css/tree.css
diff --git a/chrome/browser/resources/shared/css/tree.css b/chrome/browser/resources/shared/css/tree.css
index ac0b1de29f7d746c93c3a4026483f5f4403396ce..6acf1127611092d2d4b5bf645d0fd6d0c383c550 100644
--- a/chrome/browser/resources/shared/css/tree.css
+++ b/chrome/browser/resources/shared/css/tree.css
@@ -99,11 +99,26 @@ tree:focus .tree-row[selected] {
 }
 
 .tree-label {
+  white-space: pre;
+}
+
+tree[icon-visibility] .tree-label {
   -webkit-padding-start: 20px;
-  background-image: url("../../../../../ui/resources/folder_closed.png");
   background-position: 0 50%;
   background-repeat: no-repeat;
-  white-space: pre;
+}
+
+tree[icon-visibility='all'] .tree-label,

[arv (Not doing code reviews), 2011/10/28 00:03:40]

remove quotes for consistency... oh it is already inconsistent in this file. Do
you mind fixing?

[flackr, 2011/10/28 15:19:36]

Done.

+tree[icon-visibility='parent'] .tree-row[may-have-children] > .tree-label {
+  background-image: url("../../../../../ui/resources/folder_closed.png");
+}
+
+tree[icon-visibility='parent'] .tree-row[has-children=false] > .tree-label {
+  background-image: none;
+}
+
+tree[icon-visibility] .tree-item[expanded] > .tree-row > .tree-label {
+  background-image: url("../../../../../ui/resources/folder_open.png");
 }
 
 /* We need to ensure that even empty labels take up space */
@@ -124,15 +139,14 @@ html[dir=rtl] .tree-label {
   background-position: 100% 50%;
 }
 
-.tree-item[expanded] > .tree-row > .tree-label {
-  background-image: url("../../../../../ui/resources/folder_open.png");
-}
-
-html[dir='rtl'] .tree-label {
+html[dir='rtl'] tree[icon-visibility='all'] .tree-label,
+html[dir='rtl'] tree[icon-visibility='parent'] .tree-row[may-have-children]
+    > .tree-label {
   background-image: url("../../../../../ui/resources/folder_closed_rtl.png");
 }
 
-html[dir='rtl'] .tree-item[expanded] > .tree-row > .tree-label {
+html[dir='rtl'] tree[icon-visibility] .tree-item[expanded] > .tree-row
+    > .tree-label {
   background-image: url("../../../../../ui/resources/folder_open_rtl.png");
 }