Convert visitedlink to use mojo.

components/visitedlink/common/visitedlink.mojom

Index: components/visitedlink/common/visitedlink.mojom
diff --git a/components/visitedlink/common/visitedlink.mojom b/components/visitedlink/common/visitedlink.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..9a8ce865de4632e87e40aaa3991efc2064654340
--- /dev/null
+++ b/components/visitedlink/common/visitedlink.mojom
@@ -0,0 +1,22 @@
+// Copyright 2016 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 visitedlink.mojom;
+
+interface VisitedLinkNotificationSink {
+  // Notification that the visited link database has been replaced. It has one
+  // SharedMemoryHandle argument consisting of the table handle.
+  UpdateVisitedLinks(handle<shared_buffer> table_handle);
+
+  // Notification that one or more links have been added and the link coloring
+  // state for the given hashes must be re-calculated.
+  AddVisitedLinks(array<uint64> link_hashes);
+
+  // Notification that one or more history items have been deleted, which at
+  // this point means that all link coloring state must be re-calculated.
+  // |invalidate_cached_hashes| is used to inform renderer process to invalidate
+  // cached visited links hashes. The flag is needed because the salt will
+  // change after loading the visitedlink table from the database file.
+  ResetVisitedLinks(bool invalidate_cached_hashes);
+};