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diff --git a/components/autofill/content/browser/wallet/wallet_client_delegate.h b/components/autofill/content/browser/wallet/wallet_client_delegate.h
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+++ b/components/autofill/content/browser/wallet/wallet_client_delegate.h
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+// Copyright 2013 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_AUTOFILL_BROWSER_WALLET_WALLET_CLIENT_OBSERVER_H_
+#define COMPONENTS_AUTOFILL_BROWSER_WALLET_WALLET_CLIENT_OBSERVER_H_
+
+#include <string>
+
+#include "base/memory/scoped_ptr.h"
+#include "components/autofill/browser/autofill_manager_delegate.h"
+#include "components/autofill/content/browser/wallet/wallet_client.h"
+
+class AutofillMetrics;
+
+namespace autofill {
+namespace wallet {
+
+class FullWallet;
+class WalletItems;
+
+// WalletClientDelegate is to be implemented any classes making calls with
+// WalletClient. The appropriate callback method will be called on
+// WalletClientDelegate with the response from the Online Wallet backend.
+class WalletClientDelegate {
+ public:
+  // --------------------------------------
+  // Accessors called when making requests.
+  // --------------------------------------
+
+  // Returns the MetricLogger instance that should be used for logging Online
+  // Wallet metrics.
+  virtual const AutofillMetrics& GetMetricLogger() const = 0;
+
+  // Returns the dialog type that the delegate corresponds to.
+  virtual DialogType GetDialogType() const = 0;
+
+  // Returns the serialized fingerprint data to be sent to the Risk server.
+  virtual std::string GetRiskData() const = 0;
+
+  // --------------------------------------------------------------------------
+  // Callbacks called with responses from the Online Wallet backend.
+  // --------------------------------------------------------------------------
+
+  // Called when an AcceptLegalDocuments request finishes successfully.
+  virtual void OnDidAcceptLegalDocuments() = 0;
+
+  // Called when an AuthenticateInstrument request finishes successfully.
+  virtual void OnDidAuthenticateInstrument(bool success) = 0;
+
+  // Called when a GetFullWallet request finishes successfully. Ownership is
+  // transferred to implementer of this interface.
+  virtual void OnDidGetFullWallet(scoped_ptr<FullWallet> full_wallet) = 0;
+
+  // Called when a GetWalletItems request finishes successfully. Ownership is
+  // transferred to implementer of this interface.
+  virtual void OnDidGetWalletItems(scoped_ptr<WalletItems> wallet_items) = 0;
+
+  // Called when a SaveAddress request finishes successfully. |address_id| can
+  // be used in subsequent GetFullWallet calls. |required_actions| is populated
+  // if there was a validation error with the data being saved.
+  virtual void OnDidSaveAddress(
+      const std::string& address_id,
+      const std::vector<RequiredAction>& required_actions) = 0;
+
+  // Called when a SaveInstrument request finishes sucessfully. |instrument_id|
+  // can be used in subsequent GetFullWallet calls. |required_actions| is
+  // populated if there was a validation error with the data being saved.
+  virtual void OnDidSaveInstrument(
+      const std::string& instrument_id,
+      const std::vector<RequiredAction>& required_actions) = 0;
+
+  // Called when a SaveInstrumentAndAddress request finishes succesfully.
+  // |instrument_id| and |address_id| can be used in subsequent
+  // GetFullWallet calls. |required_actions| is populated if there was a
+  // validation error with the data being saved.
+  virtual void OnDidSaveInstrumentAndAddress(
+      const std::string& instrument_id,
+      const std::string& address_id,
+      const std::vector<RequiredAction>& required_actions) = 0;
+
+  // Called when an UpdateAddress request finishes successfully.
+  // |required_actions| is populated if there was a validation error with the
+  // data being saved.
+  virtual void OnDidUpdateAddress(
+      const std::string& address_id,
+      const std::vector<RequiredAction>& required_actions) = 0;
+
+  // Called when an UpdateInstrument request finishes successfully.
+  // |required_actions| is populated if there was a validation error with the
+  // data being saved.
+  virtual void OnDidUpdateInstrument(
+      const std::string& instrument_id,
+      const std::vector<RequiredAction>& required_actions) = 0;
+
+  // Called when a request fails due to an Online Wallet error.
+  virtual void OnWalletError(WalletClient::ErrorType error_type) = 0;
+
+  // Called when a request fails due to a malformed response.
+  virtual void OnMalformedResponse() = 0;
+
+  // Called when a request fails due to a network error.
+  virtual void OnNetworkError(int response_code) = 0;
+
+ protected:
+  virtual ~WalletClientDelegate() {}
+};
+
+}  // namespace wallet
+}  // namespace autofill
+
+#endif  // COMPONENTS_AUTOFILL_BROWSER_WALLET_WALLET_CLIENT_OBSERVER_H_