Add back the "Opening Links in Chrome" page to the sidenav.

chrome/common/extensions/docs/templates/json/chrome_sidenav.json

 [
   {
     "title": "Devtools",
     "items": [
       {
         "title": "Learn Basics",
         "href": "/devtools",
         "items": [
           {
             "title": "Overview",
@@ skipping 240 matching lines @@
           },
           {
             "title": "WebView Workflow",
             "href": "/multidevice/webview/workflow"
           },
           {
             "title": "Tips & Tricks",
             "href": "/multidevice/webview/tipsandtricks"
           }
         ]
+      },
+      {
+        "title": "Chrome for iOS",
+        "href": "/multidevice/ios/links",
+        "items": [
+          {
+            "title": "Opening Links in Chrome",
+            "href": "/multidevice/ios/links"
+          },
+          {
+            "title": "User Agent",
+            "href": "/multidevice/user-agent#chrome_for_ios_user_agent"
+          }
+        ]
       }
     ]
   },
   {
     "title": "Platform",
     "items": [
       {
         "title": "Apps",
         "href": "/apps/about_apps",
         "items": [
@@ skipping 768 matching lines @@
                 "title": "Articles",
                 "href": "/webstore/articles"
               }
             ]
           }
         ]
       }
     ]
   }
 ]