DevTools: Implement extension-based status bar buttons

Source/devtools/front_end/components/InspectElementModeController.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 13 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 /**
  * @constructor
  */
 WebInspector.InspectElementModeController = function()
 {
-    this.toggleSearchButton = new WebInspector.StatusBarButton(WebInspector.UIString("Select an element in the page to inspect it."), "node-search-status-bar-item");
-    this.toggleSearchButton.addEventListener("click", this.toggleSearch, this);
+    this._toggleSearchButton = new WebInspector.StatusBarButton(WebInspector.UIString("Select an element in the page to inspect it."), "node-search-status-bar-item");
     this._shortcut = WebInspector.InspectElementModeController.createShortcut();
 }
 
 WebInspector.InspectElementModeController.createShortcut = function()
 {
     return WebInspector.KeyboardShortcut.makeDescriptor("c", WebInspector.KeyboardShortcut.Modifiers.CtrlOrMeta | WebInspector.KeyboardShortcut.Modifiers.Shift);
 }
 
 WebInspector.InspectElementModeController.prototype = {
     /**
      * @return {boolean}
      */
     enabled: function()
     {
-        return this.toggleSearchButton.toggled;
+        return this._toggleSearchButton.toggled;
     },
 
     disable: function()
     {
         if (this.enabled())
             this.toggleSearch();
     },
 
     toggleSearch: function()
     {
         var enabled = !this.enabled();
-        this.toggleSearchButton.toggled = enabled;
+        this._toggleSearchButton.toggled = enabled;
 
         var targets = WebInspector.targetManager.targets();
         for (var i = 0; i < targets.length; ++i)
             targets[i].domModel.setInspectModeEnabled(enabled, WebInspector.settings.showUAShadowDOM.get());
     }
 }
 
 /**
  * @constructor
  * @implements {WebInspector.ActionDelegate}
  */
 WebInspector.InspectElementModeController.ToggleSearchActionDelegate = function()
 {
 }
 
 WebInspector.InspectElementModeController.ToggleSearchActionDelegate.prototype = {
     /**
      * @return {boolean}
      */
     handleAction: function()
     {
         if (!WebInspector.inspectElementModeController)
             return false;
         WebInspector.inspectElementModeController.toggleSearch();
         return true;
     }
 }
 
-/** @type {!WebInspector.InspectElementModeController} */
-WebInspector.inspectElementModeController;
+/**
+ * @constructor
+ * @implements {WebInspector.StatusBarButton.Provider}
+ */
+WebInspector.InspectElementModeController.ToggleButtonProvider = function()
+{
+}
+
+WebInspector.InspectElementModeController.ToggleButtonProvider.prototype = {
+    /**
+     * @return {?WebInspector.StatusBarButton}
+     */
+    button: function()
+    {
+        if (!WebInspector.inspectElementModeController)
+            return null;
+
+        return WebInspector.inspectElementModeController._toggleSearchButton;
+    }
+}
+
+/** @type {?WebInspector.InspectElementModeController} */
+WebInspector.inspectElementModeController = null;