[DevTools] Make toolbar counters declarative.

Source/devtools/front_end/ui/StatusBarButton.js

Index: Source/devtools/front_end/ui/StatusBarButton.js
diff --git a/Source/devtools/front_end/ui/StatusBarButton.js b/Source/devtools/front_end/ui/StatusBarButton.js
index c2b092e2113bc656f9c46eab3bf5340a2868ef84..df8d69b9aeb2245042a695b6ee4e32a22bd5605e 100644
--- a/Source/devtools/front_end/ui/StatusBarButton.js
+++ b/Source/devtools/front_end/ui/StatusBarButton.js
@@ -79,6 +79,84 @@ WebInspector.StatusBarItem.prototype = {
 /**
  * @constructor
  * @extends {WebInspector.StatusBarItem}
+ * @param {!Array.<string>} counters
+ * @param {string=} className
+ */
+WebInspector.StatusBarCounter = function(counters, className)
+{
+    WebInspector.StatusBarItem.call(this, "div");
+    this.element.className = "status-bar-item status-bar-counter hidden";
+    if (className)
+        this.element.classList.add(className);
+    this.element.addEventListener("click", this._clicked.bind(this), false);
+    /** @type {!Array.<!{element: !Element, counter: string, value: number, title: string}>} */
+    this._counters = [];
+    for (var i = 0; i < counters.length; ++i) {
+        var element = this.element.createChild("span", "status-bar-counter-item");
+        element.createChild("div", counters[i]);
+        element.createChild("span");
+        this._counters.push({counter: counters[i], element: element, value: 0, title: ""});
+    }
+    this._update();
+}
+
+WebInspector.StatusBarCounter.prototype = {
+    /**
+     * @param {string} counter
+     * @param {number} value
+     * @param {string} title
+     */
+    setCounter: function(counter, value, title)
+    {
+        for (var i = 0; i < this._counters.length; ++i) {
+            if (this._counters[i].counter === counter) {
+                this._counters[i].value = value;
+                this._counters[i].title = title;
+                this._update();
+                return;
+            }
+        }
+    },
+
+    _update: function()
+    {
+        var total = 0;
+        var title = "";
+        for (var i = 0; i < this._counters.length; ++i) {
+            var counter = this._counters[i];
+            var value = counter.value;
+            if (!counter.value) {
+                counter.element.classList.add("hidden");
+                continue;
+            }
+            counter.element.classList.remove("hidden");
+            counter.element.classList.toggle("status-bar-counter-item-first", !total);
+            counter.element.querySelector("span").textContent = value;
+            total += value;
+            if (counter.title) {
+                if (title)
+                    title += ", ";
+                title += counter.title;
+            }
+        }
+        this.element.classList.toggle("hidden", !total);
+        this.element.title = title;
+    },
+
+    /**
+     * @param {!Event} event
+     */
+    _clicked: function(event)
+    {
+        this.dispatchEventToListeners("click");
+    },
+
+    __proto__: WebInspector.StatusBarItem.prototype
+}
+
+/**
+ * @constructor
+ * @extends {WebInspector.StatusBarItem}
  * @param {string} text
  * @param {string=} className
  */
@@ -426,15 +504,15 @@ WebInspector.StatusBarButton.prototype = {
 /**
  * @interface
  */
-WebInspector.StatusBarButton.Provider = function()
+WebInspector.StatusBarItem.Provider = function()
 {
 }
 
-WebInspector.StatusBarButton.Provider.prototype = {
+WebInspector.StatusBarItem.Provider.prototype = {
     /**
-     * @return {?WebInspector.StatusBarButton}
+     * @return {?WebInspector.StatusBarItem}
      */
-    button: function() {}
+    item: function() {}
 }
 
 /**