Show database icon for Shared storage subitems

Screenshot:http://b/40065014#attachment71787251
Bug: 40065014
Change-Id: Ie208f4a15c183de4e116b9ca4c49720f4838ff33
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/7260694
Commit-Queue: Benedikt Meurer <[email protected]>
Reviewed-by: Benedikt Meurer <[email protected]>
Auto-Submit: Kateryna Prokopenko <[email protected]>

Author: Kateryna Prokopenko

front_end/panels/application/SharedStorageTreeElement.ts

@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import type * as Platform from '../../core/platform/platform.js';
+import {createIcon} from '../../ui/kit/kit.js';
 import * as VisualLogging from '../../ui/visual_logging/visual_logging.js';
 
 import {ApplicationPanelTreeElement} from './ApplicationPanelTreeElement.js';
@@ -22,6 +23,8 @@ export class SharedStorageTreeElement extends ApplicationPanelTreeElement {
     const treeElement = new SharedStorageTreeElement(resourcesPanel, sharedStorage);
     treeElement.view = await SharedStorageItemsView.createView(sharedStorage);
     treeElement.view.element.setAttribute('jslog', `${VisualLogging.pane('shared-storage-data')}`);
+    const sharedStorageIcon = createIcon('database');
+    treeElement.setLeadingIcons([sharedStorageIcon]);
     return treeElement;
   }