Devtools UI: Show multiple shortcuts, show more shortcuts

Source/devtools/front_end/ui/Tooltip.js

Index: Source/devtools/front_end/ui/Tooltip.js
diff --git a/Source/devtools/front_end/ui/Tooltip.js b/Source/devtools/front_end/ui/Tooltip.js
index 7cb6998eb028b5c0839b30c8b5541d2d72ed1e15..8e8fdb8e7265813240eb07c1c0e9cb7d718339c1 100644
--- a/Source/devtools/front_end/ui/Tooltip.js
+++ b/Source/devtools/front_end/ui/Tooltip.js
@@ -64,11 +64,11 @@ WebInspector.Tooltip.prototype = {
         else
             this._tooltipElement.appendChild(tooltip.content);
 
-        if (tooltip.actionId) {
-            var shortcuts = WebInspector.shortcutRegistry.shortcutDescriptorsForAction(tooltip.actionId);
-            if (shortcuts && shortcuts.length) {
+        if (tooltip.shortcuts || tooltip.actionId) {
+            var shortcuts = tooltip.shortcuts || WebInspector.shortcutRegistry.shortcutDescriptorsForAction(tooltip.actionId);
+            for (var shortcut of shortcuts) {
                 var shortcutElement = this._tooltipElement.createChild("div", "tooltip-shortcut");
-                shortcutElement.textContent = shortcuts[0].name;
+                shortcutElement.textContent = shortcut.name;
             }
         }
 
@@ -135,11 +135,12 @@ WebInspector.Tooltip.installHandler = function(doc)
  * @param {!Element|string} tooltipContent
  * @param {string=} alignment
  * @param {string=} actionId
+ * @param {!Array.<!WebInspector.KeyboardShortcut.Descriptor>=} shortcuts
  */
-WebInspector.Tooltip.install = function(element, tooltipContent, alignment, actionId)
+WebInspector.Tooltip.install = function(element, tooltipContent, alignment, actionId, shortcuts)
 {
     if (Runtime.experiments.isEnabled("tooltips"))
-        element[WebInspector.Tooltip._symbol] =  { content: tooltipContent, alignment: alignment, actionId: actionId };
+        element[WebInspector.Tooltip._symbol] =  { content: tooltipContent, alignment: alignment, actionId: actionId, shortcuts: shortcuts };
     else if (typeof tooltipContent === "string")
         element.title = tooltipContent;
     else