extensions: Introduce a fake ExtensionsClient implementation.

extensions/test/test_permissions_provider.h

+// 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.
+
+#ifndef EXTENSIONS_TEST_TEST_PERMISSIONS_PROVIDER_H_
+#define EXTENSIONS_TEST_TEST_PERMISSIONS_PROVIDER_H_
+
+#include "base/macros.h"
+#include "extensions/common/permissions/permissions_provider.h"
+
+namespace extensions {
+
+class TestPermissionsProvider : public PermissionsProvider {
+ public:
+  TestPermissionsProvider();
+  virtual ~TestPermissionsProvider();
+
+ private:
+  // PermissionsProvider:
+  virtual std::vector<APIPermissionInfo*> GetAllPermissions() const OVERRIDE;
+  virtual std::vector<AliasInfo> GetAllAliases() const OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(TestPermissionsProvider);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_TEST_TEST_PERMISSIONS_PROVIDER_H_