Devtools UI: Remove redundant tooltips

Source/devtools/front_end/ui/treeoutline.js

Index: Source/devtools/front_end/ui/treeoutline.js
diff --git a/Source/devtools/front_end/ui/treeoutline.js b/Source/devtools/front_end/ui/treeoutline.js
index 08950c6777168b68734c2ba076fd474ef0a0834f..b1284f884e1f5bed5bd185920cb6df4cfb2b6687 100644
--- a/Source/devtools/front_end/ui/treeoutline.js
+++ b/Source/devtools/front_end/ui/treeoutline.js
@@ -312,8 +312,6 @@ function TreeElement(title, expandable)
     this._listItemNode.treeElement = this;
     if (title)
         this.title = title;
-    if (typeof title === "string")
-        this.tooltip = title;

[dgozman, 2015/08/12 17:19:34]

Although this is a rare case, I was able to see this tooltip, for example in
local modifications view. It is fine there.
Do you have examples where this looks bad to weight removing vs leaving?

[samli, 2015/08/17 00:53:26]

Even in local modifications, it is just showing what is already there. This adds
zero value and devalues the overall usefulness of tooltips.

[samli, 2015/08/18 04:10:29]

http://i.imgur.com/4w8ymwp.png

     this._listItemNode.addEventListener("mousedown", this._handleMouseDown.bind(this), false);
     this._listItemNode.addEventListener("selectstart", this._treeElementSelectStart.bind(this), false);
     this._listItemNode.addEventListener("click", this._treeElementToggled.bind(this), false);