text: // 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));
    std::unique_ptr<UsbPrinterManifestData> data =
        UsbPrinterManifestData::FromValue(*usb_printers, error);
    if (!data) {
      return false;
    }
  
    extension->SetManifestData(manifest_keys::kUsbPrinters, std::move(data));
    return true;
  }
  
  const std::vector<std::string> UsbPrinterManifestHandler::Keys() const {
    return SingleKey(manifest_keys::kUsbPrinters);
  }
  
  }  // namespace extensions
  