Move shell service to toplevel shell namespace

mash/browser_driver/browser_driver_application_delegate.h

Index: mash/browser_driver/browser_driver_application_delegate.h
diff --git a/mash/browser_driver/browser_driver_application_delegate.h b/mash/browser_driver/browser_driver_application_delegate.h
index 2a251c26fe4f97d8f32cf2145cf06b77ed69a6e8..73c34aad995e366b5c6e210e7b9e7ef5b33c743e 100644
--- a/mash/browser_driver/browser_driver_application_delegate.h
+++ b/mash/browser_driver/browser_driver_application_delegate.h
@@ -19,17 +19,18 @@
 namespace mash {
 namespace browser_driver {
 
-class BrowserDriverApplicationDelegate : public mojo::ShellClient,
+class BrowserDriverApplicationDelegate : public shell::ShellClient,
                                          public mus::mojom::AcceleratorHandler {
  public:
   BrowserDriverApplicationDelegate();
   ~BrowserDriverApplicationDelegate() override;
 
  private:
-  // mojo::ShellClient:
-  void Initialize(mojo::Connector* connector, const mojo::Identity& identity,
+  // shell::ShellClient:
+  void Initialize(shell::Connector* connector,
+                  const shell::Identity& identity,
                   uint32_t id) override;
-  bool AcceptConnection(mojo::Connection* connection) override;
+  bool AcceptConnection(shell::Connection* connection) override;
   bool ShellConnectionLost() override;
 
   // mus::mojom::AcceleratorHandler:
@@ -37,7 +38,7 @@ class BrowserDriverApplicationDelegate : public mojo::ShellClient,
 
   void AddAccelerators();
 
-  mojo::Connector* connector_;
+  shell::Connector* connector_;
   mojo::Binding<mus::mojom::AcceleratorHandler> binding_;
   base::WeakPtrFactory<BrowserDriverApplicationDelegate> weak_factory_;