Convert PDF component IPC to mojo.

components/pdf/common/pdf.mojom

Index: components/pdf/common/pdf.mojom
diff --git a/components/pdf/common/pdf.mojom b/components/pdf/common/pdf.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..0aaed7ba38fed504f27c745a692be8b668e59a85
--- /dev/null
+++ b/components/pdf/common/pdf.mojom
@@ -0,0 +1,19 @@
+// 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(int32 restrictions);
+
+  // 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);
+};