Convert //extensions/{common,shell} from scoped_ptr to std::unique_ptr

extensions/common/api/printer_provider/usb_printer_manifest_handler.cc

 // Copyright 2015 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/api/printer_provider/usb_printer_manifest_handler.h"
 
 #include "extensions/common/api/printer_provider/usb_printer_manifest_data.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest_constants.h"
 
 namespace extensions {
 
 UsbPrinterManifestHandler::UsbPrinterManifestHandler() {
 }
 
 UsbPrinterManifestHandler::~UsbPrinterManifestHandler() {
 }
 
 bool UsbPrinterManifestHandler::Parse(Extension* extension,
                                       base::string16* error) {
   const base::Value* usb_printers = nullptr;
   CHECK(extension->manifest()->Get(manifest_keys::kUsbPrinters, &usb_printers));
-  scoped_ptr<UsbPrinterManifestData> data =
+  std::unique_ptr<UsbPrinterManifestData> data =
       UsbPrinterManifestData::FromValue(*usb_printers, error);
   if (!data) {
     return false;
   }
 
   extension->SetManifestData(manifest_keys::kUsbPrinters, data.release());
   return true;
 }
 
 const std::vector<std::string> UsbPrinterManifestHandler::Keys() const {
   return SingleKey(manifest_keys::kUsbPrinters);
 }
 
 }  // namespace extensions