DevTools: Add support for showing shortcuts based on shortcuts registry and use it for pause/resume…

Source/devtools/front_end/ui/ShortcutRegistry.js

Index: Source/devtools/front_end/ui/ShortcutRegistry.js
diff --git a/Source/devtools/front_end/ui/ShortcutRegistry.js b/Source/devtools/front_end/ui/ShortcutRegistry.js
index 229d834ca7d5414f68d2f202a3d808b2bfd277fc..9f5a1e7e35fd1d1e6bc431103ca91b72e6671c5d 100644
--- a/Source/devtools/front_end/ui/ShortcutRegistry.js
+++ b/Source/devtools/front_end/ui/ShortcutRegistry.js
@@ -11,6 +11,8 @@ WebInspector.ShortcutRegistry = function(actionRegistry)
     this._actionRegistry = actionRegistry;
     /** @type {!StringMultimap.<string>} */
     this._defaultKeyToActions = new StringMultimap();
+    /** @type {!StringMultimap.<!WebInspector.KeyboardShortcut.Descriptor>} */
+    this._defaultActionToShortcut = new StringMultimap();
     this._registerBindings();
 }
 
@@ -49,22 +51,26 @@ WebInspector.ShortcutRegistry.prototype = {
     },
 
     /**
+     * @param {string} actionId
+     * @return {!Array.<!WebInspector.KeyboardShortcut.Descriptor>}
+     */
+    shortcutDescriptorsForAction: function(actionId)
+    {
+        return this._defaultActionToShortcut.get(actionId).values();
+    },
+
+    /**
      * @param {!Array.<string>} actionIds
      * @return {!Array.<number>}
      */
     keysForActions: function(actionIds)
     {
-        var actionIdSet = actionIds.keySet();
         var result = [];
-        this._defaultKeyToActions.keys().forEach(function(key) {
-            var actionIdsForKey = this._defaultKeyToActions.get(key);
-            actionIdsForKey.values().some(function(actionId) {
-               if (actionIdSet.hasOwnProperty(actionId)) {
-                   result.push(key);
-                   return true;
-               }
-            });
-        }, this);
+        for (var i = 0; i < actionIds.length; ++i) {
+            var descriptors = this.shortcutDescriptorsForAction(actionIds[i]);
+            for (var j = 0; j < descriptors.length; ++j)
+                result.push(descriptors[j]);
+        }
         return result;
     },
 
@@ -149,10 +155,11 @@ WebInspector.ShortcutRegistry.prototype = {
      */
     registerShortcut: function(actionId, shortcut)
     {
-        var key = WebInspector.KeyboardShortcut.makeKeyFromBindingShortcut(shortcut);
-        if (!key)
+        var descriptor = WebInspector.KeyboardShortcut.makeDescriptorFromBindingShortcut(shortcut);
+        if (!descriptor)
             return;
-        this._defaultKeyToActions.put(String(key), actionId);
+        this._defaultActionToShortcut.put(actionId, descriptor);
+        this._defaultKeyToActions.put(String(descriptor.key), actionId);
     },
 
     /**