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diff --git a/components/rlz/rlz_tracker_delegate.h b/components/rlz/rlz_tracker_delegate.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_RLZ_RLZ_TRACKER_DELEGATE_H_
+#define COMPONENTS_RLZ_RLZ_TRACKER_DELEGATE_H_
+
+#include <string>
+
+#include "base/callback_forward.h"
+#include "base/macros.h"
+#include "base/strings/string16.h"
+#include "base/threading/sequenced_worker_pool.h"
+
+namespace base {
+class SequencedWorkerPool;
+}
+
+namespace net {
+class URLRequestContextGetter;
+}
+
+namespace rlz {
+
+// RLZTrackerDelegate is an abstract interface that provides access to embedder
+// specific singletons or gives information about the embedder environment.
+class RLZTrackerDelegate {
+ public:
+  RLZTrackerDelegate() {}
+  virtual ~RLZTrackerDelegate() {}
+
+  // Invoked during RLZTracker cleanup, to request the cleanup of the delegate.
+  virtual void Cleanup() = 0;
+
+  // Returns whether the current thread is the UI thread.
+  virtual bool IsOnUIThread() = 0;
+
+  // Returns the SequencedWorkerPool where the RLZTracker will post its tasks
+  // that should be executed in the background.
+  virtual base::SequencedWorkerPool* GetBlockingPool() = 0;
+
+  // Returns the URLRequestContextGetter to use for network connections.
+  virtual net::URLRequestContextGetter* GetRequestContext() = 0;
+
+  // Returns the brand code for the installation of Chrome in |brand| and a
+  // boolean indicating whether the operation was a success or not.
+  virtual bool GetBrand(std::string* brand) = 0;
+
+  // Returns whether |brand| is an organic brand.
+  virtual bool IsBrandOrganic(const std::string& brand) = 0;
+
+  // Returns the reactivation brand code for Chrome in |brand| and a boolean
+  // indicating whether the operation was a success or not.
+  virtual bool GetReactivationBrand(std::string* brand) = 0;
+
+  // Returns true if RLZTracker should ignore initial delay for testing.
+  virtual bool ShouldEnableZeroDelayForTesting() = 0;
+
+  // Returns the installation language in |language| and a boolean indicating
+  // whether the operation was a success or not.
+  virtual bool GetLanguage(base::string16* language) = 0;
+
+  // Returns the referral code in |referral| and a boolean indicating whether
+  // the operation was a success or not. Deprecated.
+  virtual bool GetReferral(base::string16* referral) = 0;
+
+  // Clears the referral code. Deprecated.
+  virtual bool ClearReferral() = 0;
+
+  // Registers |callback| to be invoked the next time the user perform a search
+  // using Google search engine via the omnibox. Callback will invoked at most
+  // once.
+  virtual void SetOmniboxSearchCallback(const base::Closure& callback) = 0;
+
+  // Registers |callback| to be invoked the next time the user perform a search
+  // using Google search engine via the homepage. Callback will invoked at most
+  // once.
+  virtual void SetHomepageSearchCallback(const base::Closure& callback) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(RLZTrackerDelegate);
+};
+
+}  // namespace rlz
+
+#endif  // COMPONENTS_RLZ_RLZ_TRACKER_DELEGATE_H_