Bug 1130466 - Add tooltip to console log-line icon. r=jryans

browser/devtools/webconsole/console-output.js

@@ -836,6 +836,7 @@ Messages.Simple.prototype = Heritage.extend(Messages.BaseMessage.prototype,
 
     let icon = this.document.createElementNS(XHTML_NS, "span");
     icon.className = "icon";
+    icon.title = l10n.getStr("severity." + this._severityNameCompat);
 
     // Apply the current group by indenting appropriately.
     // TODO: remove this once bug 778766 is fixed.

browser/locales/en-US/chrome/browser/devtools/webconsole.properties

@@ -257,3 +257,10 @@ table.index=(index)
 table.iterationIndex=(iteration index)
 table.key=Key
 table.value=Values
+
+# LOCALIZATION NOTE (severity.error, severity.warn, severity.info, severity.log):
+# tooltip for icons next to console output
+severity.error=Error
+severity.warn=Warning
+severity.info=Info
+severity.log=Log