Auto expand enhanced protection section when the parameter is set.

Bug: 1130728
Change-Id: I9549b464abedb6e06b706a2923ccf613a99f02ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2434884Reviewed-by: Theodore Olsauskas-Warren <sauski@google.com>
Reviewed-by: Varun Khaneja <vakh@chromium.org>
Commit-Queue: Xinghui Lu <xinghuilu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814298}

chrome/browser/resources/settings/privacy_page/security_page.js

@@ -164,6 +164,12 @@ Polymer({
     if (route === routes.SECURITY) {
       this.metricsBrowserProxy_.recordSafeBrowsingInteractionHistogram(
           SafeBrowsingInteractions.SAFE_BROWSING_SHOWED);
+      const queryParams = Router.getInstance().getQueryParameters();
+      const section = queryParams.get('q');
+      if (section === 'enhanced') {
+        this.$.safeBrowsingEnhanced.expanded = true;
+        this.$.safeBrowsingStandard.expanded = false;
+      }
     }
   },
 

chrome/test/data/webui/settings/security_page_test.js

@@ -546,6 +546,22 @@ suite('CrSettingsSecurityPageTest', function() {
         await testMetricsBrowserProxy.whenCalled(
             'recordSafeBrowsingInteractionHistogram'));
   });
+
+  test('enhancedProtectionAutoExpanded', function() {
+    // Standard protection should be pre-expanded if there is no param.
+    Router.getInstance().navigateTo(routes.SECURITY);
+    assertFalse(page.$$('#safeBrowsingEnhanced').expanded);
+    assertTrue(page.$$('#safeBrowsingStandard').expanded);
+    // Enhanced protection should be pre-expanded if the param is set to
+    // enhanced.
+    Router.getInstance().navigateTo(
+        routes.SECURITY,
+        /* dynamicParams= */ new URLSearchParams('q=enhanced'));
+    assertEquals(
+        SafeBrowsingSetting.STANDARD, page.prefs.generated.safe_browsing.value);
+    assertTrue(page.$$('#safeBrowsingEnhanced').expanded);
+    assertFalse(page.$$('#safeBrowsingStandard').expanded);
+  });
 });