[Side Panel API] Add copyright to sidepanel samples (#908)

* Add copyright to sidepanel samples

* Fix year

* Add error catching
and async

functional-samples/cookbook.sidepanel-multiple/service-worker.js

@@ -1,3 +1,17 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 const welcomePage = 'sidepanels/welcome-sp.html';
 const mainPage = 'sidepanels/main-sp.html';
 

functional-samples/cookbook.sidepanel-site-specific/service-worker.js

@@ -1,21 +1,37 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 const GOOGLE_ORIGIN = 'https://www.google.com';
 
 // Allows users to open the side panel by clicking on the action toolbar icon
-chrome.sidePanel.setPanelBehavior({ openPanelOnActionClick: true });
+chrome.sidePanel
+  .setPanelBehavior({ openPanelOnActionClick: true })
+  .catch((error) => console.error(error));
 
-chrome.tabs.onUpdated.addListener((tabId, info, tab) => {
+chrome.tabs.onUpdated.addListener(async (tabId, info, tab) => {
   if (!tab.url) return;
   const url = new URL(tab.url);
   // Enables the side panel on google.com
   if (url.origin === GOOGLE_ORIGIN) {
-    chrome.sidePanel.setOptions({
+    await chrome.sidePanel.setOptions({
       tabId,
       path: 'sidepanel.html',
       enabled: true
     });
   } else {
     // Disables the side panel on all other sites
-    chrome.sidePanel.setOptions({
+    await chrome.sidePanel.setOptions({
       tabId,
       enabled: false
     });

functional-samples/sample.sidepanel-dictionary/service-worker.js

@@ -1,3 +1,17 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 function setupContextMenu() {
   chrome.contextMenus.create({
     id: 'define-word',

functional-samples/sample.sidepanel-dictionary/sidepanel.js

@@ -1,3 +1,17 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 const words = {
   extensions:
     'Extensions are software programs, built on web technologies (such as HTML, CSS, and JavaScript) that enable users to customize the Chrome browsing experience.',