Convert PDF component IPC to mojo.

components/pdf/common/pdf.mojom

+// Copyright 2017 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.
+
+module pdf.mojom;
+
+import "third_party/WebKit/public/platform/referrer.mojom";
+import "url/mojo/url.mojom";
+
+interface PDFService {
+  // Updates the content restrictions, i.e. to disable print/copy.
+  UpdateContentRestrictions(int8 restrictions);

[Sam McNally, 2017/03/23 23:57:00]

I think int32 is fine.

+
+  // The currently displayed PDF has an unsupported feature.
+  HasUnsupportedFeature();
+
+  // Brings up SaveAs... dialog to save specified URL.
+  SaveURLAs(url.mojom.Url url, blink.mojom.Referrer referrer);

[Sam McNally, 2017/03/23 23:57:00]

While you're here, SaveUrlAs and PdfService.

See https://google.github.io/styleguide/cppguide.html#Function_Names

[benwells, 2017/03/29 04:18:03]

Done.

+};