Add a virtual destructor to WebCredentialManagerClient.

content/shell/test_runner/mock_credential_manager_client.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 CONTENT_SHELL_TEST_RUNNER_MOCK_CREDENTIAL_MANAGER_CLIENT_H_
 #define CONTENT_SHELL_TEST_RUNNER_MOCK_CREDENTIAL_MANAGER_CLIENT_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "third_party/WebKit/public/platform/WebCredentialManagerClient.h"
 #include "third_party/WebKit/public/platform/WebCredentialManagerError.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 
 namespace blink {
 class WebCredential;
 class WebURL;
 }
 
 namespace test_runner {
 
 class MockCredentialManagerClient : public blink::WebCredentialManagerClient {
  public:
   MockCredentialManagerClient();
-  virtual ~MockCredentialManagerClient();
+  ~MockCredentialManagerClient() override;
 
   // We take ownership of the |credential|.
   void SetResponse(blink::WebCredential* credential);
   void SetError(const std::string& error);
 
   // blink::WebCredentialManager:
   void DispatchStore(const blink::WebCredential& credential,
                      NotificationCallbacks* callbacks) override;
   void DispatchRequireUserMediation(NotificationCallbacks* callbacks) override;
   void DispatchGet(bool zero_click_only,
                    bool include_passwords,
                    const blink::WebVector<blink::WebURL>& federations,
                    RequestCallbacks* callbacks) override;
 
  private:
   std::unique_ptr<blink::WebCredential> credential_;
   blink::WebCredentialManagerError error_;
 
   DISALLOW_COPY_AND_ASSIGN(MockCredentialManagerClient);
 };
 
 }  // namespace test_runner
 
 #endif  // CONTENT_SHELL_TEST_RUNNER_MOCK_CREDENTIAL_MANAGER_CLIENT_H_