[Sync] Componentize synced_tab_delegate

components/sync_sessions/sync_sessions_client.h

Index: components/sync_sessions/sync_sessions_client.h
diff --git a/components/sync_sessions/sync_sessions_client.h b/components/sync_sessions/sync_sessions_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..68debabac5f72de764f17a6ba3121d52437175cf
--- /dev/null
+++ b/components/sync_sessions/sync_sessions_client.h
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+// 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 COMPONENTS_SYNC_SESSIONS_SYNC_SESSIONS_CLIENT_H_
+#define COMPONENTS_SYNC_SESSIONS_SYNC_SESSIONS_CLIENT_H_
+
+#include "base/macros.h"
+
+class GURL;
+
+namespace browser_sync {
+class SyncedWindowDelegatesGetter;
+}
+
+namespace sync_sessions {
+
+// Interface for clients of a sync sessions datatype. Should be used as a getter
+// for services and data the Sync Sessions datatype depends on.
+class SyncSessionsClient {
+ public:
+  SyncSessionsClient();
+  virtual ~SyncSessionsClient();
+
+  // Checks if the given url is considered interesting enough to sync. Most urls
+  // are considered interesting. Examples of ones that are not are invalid urls,
+  // files, and chrome internal pages.
+  // TODO(zea): make this a standalone function if the url constants are
+  // componentized.
+  virtual bool ShouldSyncURL(const GURL& url) const = 0;
+
+  // Returns the SyncedWindowDelegatesGetter for this client.
+  virtual browser_sync::SyncedWindowDelegatesGetter*
+  GetSyncedWindowDelegatesGetter() = 0;
+
+  // TODO(zea): add getters for the history and favicon services for the favicon
+  // cache to consume once it's componentized.
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SyncSessionsClient);
+};
+
+}  // namespace sync_sessions
+
+#endif  // COMPONENTS_SYNC_SESSIONS_SYNC_SESSIONS_CLIENT_H_