Replace base::str[n]casecmp with helper functions.

device/usb/usb_service_impl.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_service_impl.h"
 
 #include <algorithm>
 #include <list>
 #include <set>
 
@@ skipping 109 matching lines @@
     USB_PLOG(ERROR) << "Failed to get device service property";
     return false;
   }
   if (reg_data_type != REG_SZ) {
     USB_LOG(ERROR) << "Unexpected data type for driver service: "
                    << reg_data_type;
     return false;
   }
 
   USB_LOG(DEBUG) << "Driver for " << device_path << " is " << buffer << ".";
-  if (base::strncasecmp("WinUSB", (const char*)&buffer[0], sizeof "WinUSB") ==
-      0) {
+  if (base::StartsWith(reinterpret_cast<const char*>(buffer), "WinUSB",
+                       base::CompareCase::INSENSITIVE_ASCII))
     return true;
-  }
   return false;
 }
 
 #endif  // OS_WIN
 
 void GetDeviceListOnBlockingThread(
     const std::string& new_device_path,
     scoped_refptr<UsbContext> usb_context,
     scoped_refptr<base::SequencedTaskRunner> task_runner,
     base::Callback<void(libusb_device**, size_t)> callback) {
@@ skipping 542 matching lines @@
   if (it != platform_devices_.end()) {
     RemoveDevice(it->second);
   } else {
     DCHECK(ContainsKey(devices_being_enumerated_, platform_device));
     devices_being_enumerated_.erase(platform_device);
   }
   libusb_unref_device(platform_device);
 }
 
 }  // namespace device