Use the exact-width integer types defined in <stdint.h> rather than

net/base/test_completion_callback.h

 // Copyright (c) 2012 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 NET_BASE_TEST_COMPLETION_CALLBACK_H_
 #define NET_BASE_TEST_COMPLETION_CALLBACK_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 89 matching lines @@
  private:
   const base::Closure closure_;
 
   DISALLOW_COPY_AND_ASSIGN(TestClosure);
 };
 
 // Base class overridden by custom implementations of TestCompletionCallback.
 typedef internal::TestCompletionCallbackTemplate<int>
     TestCompletionCallbackBase;
 
-typedef internal::TestCompletionCallbackTemplate<int64>
+typedef internal::TestCompletionCallbackTemplate<int64_t>
     TestInt64CompletionCallbackBase;
 
 class TestCompletionCallback : public TestCompletionCallbackBase {
  public:
   TestCompletionCallback();
   ~TestCompletionCallback() override;
 
   const CompletionCallback& callback() const { return callback_; }
 
  private:
@@ skipping 24 matching lines @@
  private:
   void SetResult(int result) override;
 
   IOBuffer* buffer_;
   DISALLOW_COPY_AND_ASSIGN(ReleaseBufferCompletionCallback);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_TEST_COMPLETION_CALLBACK_H_