Convert camera vid and pid to lower case

media/capture/video/linux/camera_facing_chromeos.cc

 // Copyright 2016 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 "camera_facing_chromeos.h"
 
 #include <base/files/file_util.h>
 #include <base/logging.h>
 #include <base/strings/stringprintf.h>
 #include <base/strings/string_number_conversions.h>
@@ skipping 152 matching lines @@
           break;
         default:
           DLOG(ERROR) << "Invalid value for lens_facing: " << lens_facing;
           continue;
       }
     } else if (sub_keys.size() == 3 && sub_keys[2] == kUsbVidPid) {
       if (value.empty()) {
         DLOG(ERROR) << "model_id is empty";
         continue;
       }
-      model_id_to_camera_id_[value.as_string()] = camera_id;
+      std::string model_id = value.as_string();
+      std::transform(model_id.begin(), model_id.end(), model_id.begin(),
+                     ::tolower);
+      model_id_to_camera_id_[model_id] = camera_id;
     } else if (sub_keys.size() == 3 && sub_keys[2] == kUsbPath) {
       if (value.empty()) {
         DLOG(ERROR) << "usb_path is empty";
         continue;
       }
       usb_id_to_camera_id_[value.as_string()] = camera_id;
     }
     // Ignore unknown or unutilized attributes.
   }
 }
 
 }  // namespace media