Shorten USB enumeration control transfer timeouts to 2 seconds

device/usb/usb_descriptors.cc

 // 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.
 
 #include "device/usb/usb_descriptors.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 23 matching lines @@
 const uint8_t kInterfaceDescriptorType = 0x04;
 const uint8_t kEndpointDescriptorType = 0x05;
 const uint8_t kInterfaceAssociationDescriptorType = 11;
 
 const uint8_t kDeviceDescriptorLength = 18;
 const uint8_t kConfigurationDescriptorLength = 9;
 const uint8_t kInterfaceDescriptorLength = 9;
 const uint8_t kEndpointDescriptorLength = 7;
 const uint8_t kInterfaceAssociationDescriptorLength = 8;
 
-const int kControlTransferTimeout = 60000;  // 1 minute
+const int kControlTransferTimeout = 2000;  // 2 seconds

[mcasas, 2017/04/29 01:33:16]

nit: consider encoding the units in the name, e.g.
kControlTransferTimeoutMs

 
 struct UsbInterfaceAssociationDescriptor {
   UsbInterfaceAssociationDescriptor(uint8_t first_interface,
                                     uint8_t interface_count)
       : first_interface(first_interface), interface_count(interface_count) {}
 
   bool operator<(const UsbInterfaceAssociationDescriptor& other) const {
     return first_interface < other.first_interface;
   }
 
@@ skipping 481 matching lines @@
     callback.Run(std::move(index_map));
     return;
   }
 
   ReadStringDescriptor(device_handle, 0, 0,
                        base::Bind(&OnReadLanguageIds, device_handle,
                                   base::Passed(&index_map), callback));
 }
 
 }  // namespace device