Make PrinterProviderAPI a pure interface

extensions/browser/api/printer_provider/printer_provider_print_job.h

+// 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.
+
+#ifndef EXTENSIONS_BROWSER_API_PRINTER_PROVIDER_PRINTER_PROVIDER_PRINT_JOB_H_
+#define EXTENSIONS_BROWSER_API_PRINTER_PROVIDER_PRINTER_PROVIDER_PRINT_JOB_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/ref_counted_memory.h"
+
+namespace extensions {
+
+// Struct describing print job that should be forwarded to an extension via
+// chrome.printerProvider.onPrintRequested event.
+struct PrinterProviderPrintJob {
+  PrinterProviderPrintJob();
+  ~PrinterProviderPrintJob();
+
+  // The id of the printer that should handle the print job. The id is
+  // formatted as <extension_id>:<printer_id>, where <extension_id> is the
+  // id of the extension that manages the printer, and <printer_id> is
+  // the the printer's id within the extension (as reported via
+  // chrome.printerProvider.onGetPrintersRequested event callback).
+  std::string printer_id;
+
+  // The print job ticket.
+  std::string ticket_json;
+
+  // Content type of the document that should be printed.
+  std::string content_type;
+
+  // The document data that should be printed.
+  scoped_refptr<base::RefCountedMemory> document_bytes;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PrinterProviderPrintJob);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_API_PRINTER_PROVIDER_PRINTER_PROVIDER_PRINT_JOB_H_