Modify UsbDeviceFilter::MatchesAny to return true for empty filters

extensions/browser/api/device_permissions_prompt.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 "extensions/browser/api/device_permissions_prompt.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/i18n/message_formatter.h"
@@ skipping 108 matching lines @@
         }
       }
     }
     DCHECK(multiple() || devices.size() <= 1);
     callback_.Run(devices);
     callback_.Reset();
   }
 
   // device::UsbService::Observer implementation:
   void OnDeviceAdded(scoped_refptr<UsbDevice> device) override {
-    if (!(filters_.empty() || UsbDeviceFilter::MatchesAny(device, filters_))) {
+    if (!UsbDeviceFilter::MatchesAny(device, filters_))
       return;
-    }
 
     std::unique_ptr<DeviceInfo> device_info(new UsbDeviceInfo(device));
     device->CheckUsbAccess(
         base::Bind(&UsbDevicePermissionsPrompt::AddCheckedDevice, this,
                    base::Passed(&device_info)));
   }
 
   void OnDeviceRemoved(scoped_refptr<UsbDevice> device) override {
     for (auto it = devices_.begin(); it != devices_.end(); ++it) {
       const UsbDeviceInfo* entry =
@@ skipping 253 matching lines @@
 // static
 scoped_refptr<DevicePermissionsPrompt::Prompt>
 DevicePermissionsPrompt::CreateUsbPromptForTest(const Extension* extension,
                                                 bool multiple) {
   return make_scoped_refptr(new UsbDevicePermissionsPrompt(
       extension, nullptr, multiple, std::vector<UsbDeviceFilter>(),
       base::Bind(&NoopUsbCallback)));
 }
 
 }  // namespace extensions