Introduce TabRestoreServiceClient and //chrome implementation.

components/sessions/core/session_constants.cc

Index: components/sessions/core/session_constants.cc
diff --git a/content/public/browser/bluetooth_chooser.cc b/components/sessions/core/session_constants.cc
similarity index 53%
copy from content/public/browser/bluetooth_chooser.cc
copy to components/sessions/core/session_constants.cc
index 40d4590e3cb69b9babd371d328915f1af7d3cc38..f1a26c79177675c5ca81fec8bbb010c5d8a3a05c 100644
--- a/content/public/browser/bluetooth_chooser.cc
+++ b/components/sessions/core/session_constants.cc
@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "content/public/browser/bluetooth_chooser.h"
+#include "components/sessions/core/session_constants.h"
 
-namespace content {
+namespace sessions {
 
-BluetoothChooser::~BluetoothChooser() {}
+const int gMaxPersistNavigationCount = 6;
 
-}  // namespace content
+}  // namespace sessions