Remove v8stdint.h, it doesn't serve a purpose anymore.

testing/gtest-support.h

 // Copyright 2014 the V8 project 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 V8_TESTING_GTEST_SUPPORT_H_
 #define V8_TESTING_GTEST_SUPPORT_H_
 
-#include "include/v8stdint.h"
+#include <stddef.h>
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace testing {
 namespace internal {
 
 #define GET_TYPE_NAME(type)                \
   template <>                              \
   inline std::string GetTypeName<type>() { \
     return #type;                          \
   }
@@ skipping 33 matching lines @@
   for (_type _i = _low; _i <= _high; ++_i)                                 \
     for (bool _done = false; !_done;)                                      \
       for (_type const _var = _i; !_done;)                                 \
         for (SCOPED_TRACE(::testing::Message() << #_var << " = " << _var); \
              !_done; _done = true)
 
 }  // namespace internal
 }  // namespace testing
 
 #endif  // V8_TESTING_GTEST_SUPPORT_H_