DevTools: only set title w/ shortcut via Tooltip manager API.

Source/devtools/front_end/accessibility/AccessibilitySidebarView.js

Index: Source/devtools/front_end/accessibility/AccessibilitySidebarView.js
diff --git a/Source/devtools/front_end/accessibility/AccessibilitySidebarView.js b/Source/devtools/front_end/accessibility/AccessibilitySidebarView.js
index d6333c3361922fb844409283ae8ecb5cbbc68d71..cf767943b27eb7b6b759cab29307139ae434ffb2 100644
--- a/Source/devtools/front_end/accessibility/AccessibilitySidebarView.js
+++ b/Source/devtools/front_end/accessibility/AccessibilitySidebarView.js
@@ -461,7 +461,7 @@ WebInspector.AXNodePropertyTreeElement.createNameElement = function(name)
     var AXAttributes = WebInspector.AccessibilityStrings.AXAttributes;
     if (name in AXAttributes) {
         nameElement.textContent = WebInspector.UIString(AXAttributes[name].name);
-        WebInspector.Tooltip.install(nameElement, AXAttributes[name].description);
+        nameElement.title = AXAttributes[name].description;
         nameElement.classList.add("ax-readable-name");
     } else {
         nameElement.textContent = name;