Cleanup: Remove most enable_extensions logic in extensions code.

extensions/common/permissions/usb_device_permission.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/common/permissions/usb_device_permission.h"
 
 #include <set>
 #include <string>
 
 #include "base/logging.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
+#include "device/usb/usb_ids.h"
 #include "extensions/common/permissions/permissions_info.h"
 #include "grit/extensions_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 
-#if defined(ENABLE_EXTENSIONS)
-#include "device/usb/usb_ids.h"
-#endif
-
 namespace extensions {
 
 UsbDevicePermission::UsbDevicePermission(
     const APIPermissionInfo* info)
   : SetDisjunctionPermission<UsbDevicePermissionData,
                              UsbDevicePermission>(info) {
 }
 
 UsbDevicePermission::~UsbDevicePermission() {
 }
 
 PermissionMessages UsbDevicePermission::GetMessages() const {
   DCHECK(HasMessages());
   PermissionMessages result;
 
-#if defined(ENABLE_EXTENSIONS)
   // //device/usb/usb.gyp:device_usb is not available when extensions are
   // disabled.
   for (std::set<UsbDevicePermissionData>::const_iterator i =
       data_set_.begin(); i != data_set_.end(); ++i) {
     const char* vendor = device::UsbIds::GetVendorName(i->vendor_id());
 
     if (vendor) {
       const char* product =
           device::UsbIds::GetProductName(i->vendor_id(), i->product_id());
       if (product) {
@@ skipping 10 matching lines @@
                 IDS_EXTENSION_PROMPT_WARNING_USB_DEVICE_MISSING_PRODUCT,
                 base::ASCIIToUTF16(vendor))));
       }
     } else {
       result.push_back(PermissionMessage(
           PermissionMessage::kUsbDevice,
           l10n_util::GetStringUTF16(
               IDS_EXTENSION_PROMPT_WARNING_USB_DEVICE_MISSING_VENDOR)));
     }
   }
-#else
-  NOTREACHED();
-#endif  // defined(ENABLE_EXTENSIONS)
 
   return result;
 }
 
 }  // namespace extensions