Switch to standard integer types in base/test/.

base/test/mock_entropy_provider.h

 // 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 BASE_TEST_MOCK_ENTROPY_PROVIDER_H_
 #define BASE_TEST_MOCK_ENTROPY_PROVIDER_H_
 
+#include <stdint.h>
+
 #include "base/metrics/field_trial.h"
 
 namespace base {
 
 class MockEntropyProvider : public base::FieldTrial::EntropyProvider {
  public:
   ~MockEntropyProvider() override;
 
   // base::FieldTrial::EntropyProvider:
   double GetEntropyForTrial(const std::string& trial_name,
-                            uint32 randomization_seed) const override;
+                            uint32_t randomization_seed) const override;
 };
 
 }  // namespace base
 
 #endif  // BASE_TEST_MOCK_ENTROPY_PROVIDER_H_