scanning: Update help links

Update all the help links with the p-link for the scanning support
article.

Bug: 1059779
Change-Id: Ie6d04ad168de7a97f4afbb042c747000d60376a0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2596421Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Commit-Queue: Jesse Schettler <jschettler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837828}

chromeos/components/scanning/resources/scanner_select.html

@@ -37,7 +37,9 @@
   <div id="scanHelp" slot="error"
       hidden$="[[shouldHideScanHelpLink_(loaded, scanners)]]">
     [[i18n('noScannersHelpText')]]
-    <!-- TODO(gavinwill): Add href to the help link when available -->
-    <a id="scanHelpLink" href="#">[[i18n('noScannersHelpLinkLabel')]]</a>
+    <a id="scanHelpLink" target="_blank"
+        href="http://support.google.com/chromebook?p=chrome_scanning">
+      [[i18n('noScannersHelpLinkLabel')]]
+    </a>
   </div>
 </scan-settings-section>

chromeos/components/scanning/resources/scanning_app.html

@@ -211,9 +211,10 @@
       <iron-icon id="toastInfoIcon" icon="cr:info-outline"
           hidden="[[!showToastInfoIcon_]]"></iron-icon>
       <span id="toastText">[[i18n(toastMessageKey_)]]</span>
-      <!-- TODO(gavinwill): Add href to the help link when available -->
       <div id="getHelpDiv">
-        <a id="getHelpLink" href="#" hidden="[[!showToastHelpLink_]]">
+        <a id="getHelpLink" target="_blank"
+            href="http://support.google.com/chromebook?p=chrome_scanning"
+            hidden="[[!showToastHelpLink_]]">
           [[i18n('getHelpLinkText')]]</a>
       </div>
     </div>
@@ -227,8 +228,7 @@
       [[i18n('scanFailedDialogBodyText')]]
     </div>
     <div slot="button-container">
-      <!-- TODO(gavinwill): Add href to the help link when available -->
-      <cr-button class="cancel-button">
+      <cr-button class="cancel-button" on-click="onDialogGetHelpClick_">
         [[i18n('getHelpLinkText')]]
       </cr-button>
       <cr-button id="okButton" class="action-button"

chromeos/components/scanning/resources/scanning_app.js

@@ -549,4 +549,11 @@ Polymer({
     this.$.scanFailedDialog.close();
     this.setAppState_(AppState.READY);
   },
+
+  /** @private */
+  onDialogGetHelpClick_() {
+    this.$.scanFailedDialog.close();
+    this.setAppState_(AppState.READY);
+    window.open('http://support.google.com/chromebook?p=chrome_scanning');
+  },
 });