Get all the UsbConfigDescriptor for the device configuration

device/usb/usb_device.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 DEVICE_USB_USB_DEVICE_H_
 #define DEVICE_USB_USB_DEVICE_H_
 
+#include <vector>
+
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/strings/string16.h"
 
 namespace device {
 
 class UsbDeviceHandle;
 struct UsbConfigDescriptor;
 
@@ skipping 27 matching lines @@
 
   // Creates a UsbDeviceHandle for further manipulation.
   virtual void Open(const OpenCallback& callback) = 0;
 
   // Explicitly closes a device handle. This method will be automatically called
   // by the destructor of a UsbDeviceHandle as well.
   virtual bool Close(scoped_refptr<UsbDeviceHandle> handle) = 0;
 
   // Gets the UsbConfigDescriptor for the active device configuration or nullptr
   // if the device is unconfigured.
-  virtual const UsbConfigDescriptor* GetConfiguration() = 0;
+  virtual const UsbConfigDescriptor* GetCurrentConfiguration() = 0;

[Reilly Grant (use Gerrit), 2015/07/31 23:36:12]

GetCurrentConfiguration -> GetActiveConfiguration

[juncai, 2015/08/03 17:46:01]

Done.

+
+  // Gets all the UsbConfigDescriptor for the device configuration.
+  virtual const std::vector<UsbConfigDescriptor>& configurations() const = 0;

[Reilly Grant (use Gerrit), 2015/07/31 23:36:12]

I'd rather this was not a virtual function. You can declare a protected
set_configurations() method that UsbDeviceImpl uses to set the configurations
after the device has been constructed.

[juncai, 2015/08/03 17:46:01]

Done.

 
  protected:
   UsbDevice(uint16 vendor_id,
             uint16 product_id,
             const base::string16& manufacturer_string,
             const base::string16& product_string,
             const base::string16& serial_number);
   virtual ~UsbDevice();
 
   // These members must be mutable by subclasses as necessary during device
   // enumeration. To preserve the thread safety of this object they must remain
   // constant afterwards.
   base::string16 manufacturer_string_;
   base::string16 product_string_;
   base::string16 serial_number_;
 
  private:
   friend class base::RefCountedThreadSafe<UsbDevice>;
 
   const std::string guid_;
   const uint16 vendor_id_;
   const uint16 product_id_;
 
   DISALLOW_COPY_AND_ASSIGN(UsbDevice);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_USB_USB_DEVICE_H_