sidebar next to resources.

https://bugs.webkit.org/show_bug.cgi?id=18494

Reviewed by Adam Roben.

* page/inspector/ResourcesPanel.js:
(WebInspector.ResourcesPanel.prototype.addMessageToResource): Increment errors or warnings
on the resource. Set the bubbleText to the total of the errors and warnings. Add a error
or warning class to the bubble.
(WebInspector.ResourcesPanel.prototype.clearMessages): Zero out the errors and warnings
properties on each resource. Set the bubbleText back to an empty string.
* page/inspector/SidebarTreeElement.js:
(WebInspector.SidebarTreeElement): Create a statusElement.
(WebInspector.SidebarTreeElement.prototype.get bubbleText): Return _bubbleText.
(WebInspector.SidebarTreeElement.prototype.set bubbleText): Create bubbleElement if needed.
Assign the value to _bubbleText and bubbleElement.textContent.
(WebInspector.SidebarTreeElement.prototype.onattach): Append statusElement to _listItemNode.
* page/inspector/inspector.css: Style rules for bubbles and status elements.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@31910 268f45cc-cd09-0410-ab3c-d52691b4dbfc