Revert of Move content's shell connections to the IO thread

services/shell/public/cpp/connection.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SERVICES_SHELL_PUBLIC_CPP_CONNECTION_H_
 #define SERVICES_SHELL_PUBLIC_CPP_CONNECTION_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 19 matching lines @@
 //
 // Call AddService<T>(factory) to expose an interface to the remote application,
 // and GetInterface(&interface_ptr) to consume an interface exposed by the
 // remote application.
 //
 // Internally, this class wraps an InterfaceRegistry that accepts interfaces
 // that may be exposed to a remote application. See documentation in
 // interface_registry.h for more information.
 //
 // A Connection returned via Shell::ConnectToApplication() is owned by the
-// caller. A Connection received via OnConnect is owned by the ServiceContext.
+// caller.
+// An Connection received via OnConnect is owned by the ServiceContext.
 // To close a connection, call CloseConnection which will destroy this object.
 class Connection {
  public:
   virtual ~Connection() {}
 
   enum class State {
     // The shell has not yet processed the connection.
     PENDING,
 
     // The shell processed the connection and it was established. GetResult()
@@ skipping 99 matching lines @@
   // Returns an object encapsulating a remote InterfaceProvider.
   virtual InterfaceProvider* GetRemoteInterfaces() = 0;
 
  protected:
   virtual base::WeakPtr<Connection> GetWeakPtr() = 0;
 };
 
 }  // namespace shell
 
 #endif  // SERVICES_SHELL_PUBLIC_CPP_CONNECTION_H_