Update device/usb and its Mojo interface for variable size ISO packets.

extensions/browser/api/usb/usb_api.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 EXTENSIONS_BROWSER_API_USB_USB_API_H_
 #define EXTENSIONS_BROWSER_API_USB_USB_API_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 227 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(UsbCloseDeviceFunction);
 };
 
 class UsbClaimInterfaceFunction : public UsbConnectionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("usb.claimInterface", USB_CLAIMINTERFACE)
 
   UsbClaimInterfaceFunction();
 
- protected:
+ private:
   ~UsbClaimInterfaceFunction() override;
 
   // ExtensionFunction:
   ResponseAction Run() override;
 
   void OnComplete(bool success);
 
   DISALLOW_COPY_AND_ASSIGN(UsbClaimInterfaceFunction);
 };
 
@@ skipping 68 matching lines @@
 
  private:
   ~UsbInterruptTransferFunction() override;
 
   // ExtensionFunction:
   ResponseAction Run() override;
 
   DISALLOW_COPY_AND_ASSIGN(UsbInterruptTransferFunction);
 };
 
-class UsbIsochronousTransferFunction : public UsbTransferFunction {
+class UsbIsochronousTransferFunction : public UsbConnectionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("usb.isochronousTransfer", USB_ISOCHRONOUSTRANSFER)
 
   UsbIsochronousTransferFunction();
 
  private:
   ~UsbIsochronousTransferFunction() override;
 
   // ExtensionFunction:
   ResponseAction Run() override;
 
+  void OnCompleted(
+      scoped_refptr<net::IOBuffer> data,
+      const std::vector<device::UsbDeviceHandle::IsochronousPacket>& packets);
+
   DISALLOW_COPY_AND_ASSIGN(UsbIsochronousTransferFunction);
 };
 
 class UsbResetDeviceFunction : public UsbConnectionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("usb.resetDevice", USB_RESETDEVICE)
 
   UsbResetDeviceFunction();
 
  private:
   ~UsbResetDeviceFunction() override;
 
   // ExtensionFunction:
   ResponseAction Run() override;
 
   void OnComplete(bool success);
 
   scoped_ptr<extensions::api::usb::ResetDevice::Params> parameters_;
 
   DISALLOW_COPY_AND_ASSIGN(UsbResetDeviceFunction);
 };
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_USB_USB_API_H_