Eliminate mojo::Shell client lib class

content/public/test/test_mojo_app.h

Index: content/public/test/test_mojo_app.h
diff --git a/content/public/test/test_mojo_app.h b/content/public/test/test_mojo_app.h
index edf0ad28370b497401d63df11a1c7d9bc627d155..0ce330a242fc452231bd6efdff59fec2c796403b 100644
--- a/content/public/test/test_mojo_app.h
+++ b/content/public/test/test_mojo_app.h
@@ -27,8 +27,6 @@ class TestMojoApp : public mojo::ShellClient,
 
  private:
   // mojo::ShellClient:
-  void Initialize(mojo::Shell* shell, const std::string& url,
-                  uint32_t id, uint32_t user_id) override;
   bool AcceptConnection(mojo::Connection* connection) override;
 
   // mojo::InterfaceFactory<TestMojoService>:
@@ -41,9 +39,6 @@ class TestMojoApp : public mojo::ShellClient,
 
   mojo::Binding<TestMojoService> service_binding_;
 
-  // Not owned.
-  mojo::Shell* shell_;
-
   // The URL of the app connecting to us.
   GURL requestor_url_;