Replace IPC messages in layout_test_render_frame_observer.

content/shell/browser/content_shell_renderer_manifest_overlay.json

 {
   "name": "content_renderer",
   "interface_provider_specs": {
     "service_manager:connector": {
       "provides": {
         "browser": [
           "content::mojom::TestService"
         ]
       }
+    },
+    "navigation:frame": {
+      "provides": {
+        "browser": [
+          "content::mojom::ShellView"
+        ]
+      },
+      "requires": {

[Sam McNally, 2017/01/19 05:41:35]

I don't think this requires section is necessary.

[Jia, 2017/01/20 01:52:14]

Done.When would we need "requires" section?

[Sam McNally, 2017/01/20 02:01:27]

In this overlay, it would be necessary if the renderer needed to talk to another
service, but only in layout tests. The base manifest.json file that this overlay
over includes this part so it isn't necessary here.

+        "content_browser": [ "renderer" ]
+      }
     }
   }
 }