PaymentHandler: Implement GetAllPaymentApps().

content/browser/payments/payment_manager.h

 // Copyright 2016 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 CONTENT_BROWSER_PAYMENTS_PAYMENT_MANAGER_H_
 #define CONTENT_BROWSER_PAYMENTS_PAYMENT_MANAGER_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 11 matching lines @@
     : public NON_EXPORTED_BASE(payments::mojom::PaymentManager) {
  public:
   PaymentManager(
       PaymentAppContextImpl* payment_app_context,
       mojo::InterfaceRequest<payments::mojom::PaymentManager> request);
 
   ~PaymentManager() override;
 
  private:
   friend class PaymentAppContentUnitTestBase;
+  friend class PaymentAppProviderTest;
   friend class PaymentManagerTest;
 
   // payments::mojom::PaymentManager methods:
   void Init(const std::string& scope) override;
   void SetManifest(payments::mojom::PaymentAppManifestPtr manifest,
                    SetManifestCallback callback) override;
   void GetManifest(GetManifestCallback callback) override;
   void DeletePaymentInstrument(
       const std::string& instrument_key,
       DeletePaymentInstrumentCallback callback) override;
@@ skipping 17 matching lines @@
 
   GURL scope_;
   mojo::Binding<payments::mojom::PaymentManager> binding_;
   base::WeakPtrFactory<PaymentManager> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(PaymentManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PAYMENTS_PAYMENT_MANAGER_H_