Create GoogleURLTrackerClient interface and //chrome implementation

components/google/core/browser/google_url_tracker_client.cc

Index: components/google/core/browser/google_url_tracker_client.cc
diff --git a/components/google/core/browser/google_url_tracker_client.cc b/components/google/core/browser/google_url_tracker_client.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c3c6c23f29756b028044fddc501fec8493881513
--- /dev/null
+++ b/components/google/core/browser/google_url_tracker_client.cc
@@ -0,0 +1,11 @@
+// Copyright 2014 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.
+
+#include "components/google/core/browser/google_url_tracker_client.h"
+
+GoogleURLTrackerClient::GoogleURLTrackerClient() : google_url_tracker_(NULL) {
+}
+
+GoogleURLTrackerClient::~GoogleURLTrackerClient() {
+}