Revert of Build a basic Mojo service framework for device/usb

device/core/device_client.h

Index: device/core/device_client.h
diff --git a/device/core/device_client.h b/device/core/device_client.h
index 00fa17902ab70f58e4ea26467a45085fc227f2f1..b4a9934e55b12774b8cb1c7dc5ef0016a2ef7582 100644
--- a/device/core/device_client.h
+++ b/device/core/device_client.h
@@ -6,16 +6,11 @@
 #define DEVICE_CORE_DEVICE_CLIENT_H_
 
 #include "base/macros.h"
-#include "third_party/mojo/src/mojo/public/cpp/bindings/interface_request.h"
 
 namespace device {
 
 class HidService;
 class UsbService;
-
-namespace usb {
-class DeviceManager;
-}
 
 // Interface used by consumers of //device APIs to get pointers to the service
 // singletons appropriate for a given embedding application. For an example see
@@ -26,18 +21,13 @@
   DeviceClient();
 
   // Destruction clears the single instance.
-  virtual ~DeviceClient();
+  ~DeviceClient();
 
   // Returns the single instance of |this|.
   static DeviceClient* Get();
 
   // Returns the UsbService instance for this embedder.
   virtual UsbService* GetUsbService();
-
-  // Connects a USB DeviceManager client to a concrete implementation. If
-  // no such implementation is available the request is dropped.
-  virtual void ConnectToUSBDeviceManager(
-      mojo::InterfaceRequest<usb::DeviceManager> request);
 
   // Returns the HidService instance for this embedder.
   virtual HidService* GetHidService();