Migrated ChromeViewHostMsg_PageHasOSDD to Mojo.

chrome/common/open_search_description_document_handler.mojom

Index: chrome/common/open_search_description_document_handler.mojom
diff --git a/chrome/common/open_search_description_document_handler.mojom b/chrome/common/open_search_description_document_handler.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..060893733280582ce97314c9b5301bb07ed96fcf
--- /dev/null
+++ b/chrome/common/open_search_description_document_handler.mojom
@@ -0,0 +1,14 @@
+// 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 chrome.mojom;
+
+import "url/mojo/url.mojom";
+
+interface OpenSearchDescriptionDocumentHandler {
+  // Notification that the page has an OpenSearch description document
+  // associated with it.
+  PageHasOpenSearchDescriptionDocument(url.mojom.Url page_url,
+                                       url.mojom.Url osdd_url);
+};