Replace IPC messages in layout_test_render_frame_observer.

content/shell/browser/content_shell_renderer_manifest_overlay.json

Index: content/shell/browser/content_shell_renderer_manifest_overlay.json
diff --git a/content/shell/browser/content_shell_renderer_manifest_overlay.json b/content/shell/browser/content_shell_renderer_manifest_overlay.json
index ec2903216c197d6379b041f9eef2a1d6990114f3..b3134ee8fd0ba2477efa100614ff4c073171e0f5 100644
--- a/content/shell/browser/content_shell_renderer_manifest_overlay.json
+++ b/content/shell/browser/content_shell_renderer_manifest_overlay.json
@@ -7,6 +7,16 @@
           "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" ]
+      }
     }
   }
 }