Remove WCHAR_T_IS_UNSIGNED definition

base/strings/string_util_unittest.cc

 // Copyright 2013 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.
 
 #include "base/strings/string_util.h"
 
 #include <math.h>
 #include <stdarg.h>
 
 #include <algorithm>
@@ skipping 993 matching lines @@
 
   // Test dst_size == 0, nothing should be written to |dst| and we should
   // have the equivalent of strlen(src).
   {
     char dst[2] = {1, 2};
     wchar_t wdst[2] = {1, 2};
     EXPECT_EQ(7U, base::strlcpy(dst, "abcdefg", 0));
     EXPECT_EQ(1, dst[0]);
     EXPECT_EQ(2, dst[1]);
     EXPECT_EQ(7U, base::wcslcpy(wdst, L"abcdefg", 0));
-#if defined(WCHAR_T_IS_UNSIGNED)
-    EXPECT_EQ(1U, wdst[0]);
-    EXPECT_EQ(2U, wdst[1]);
-#else
-    EXPECT_EQ(1, wdst[0]);
-    EXPECT_EQ(2, wdst[1]);
-#endif
+    EXPECT_EQ(static_cast<wchar_t>(1), wdst[0]);
+    EXPECT_EQ(static_cast<wchar_t>(2), wdst[1]);
   }
 
   // Test the case were we _just_ competely fit including the null.
   {
     char dst[8];
     wchar_t wdst[8];
     EXPECT_EQ(7U, base::strlcpy(dst, "abcdefg", arraysize(dst)));
     EXPECT_EQ(0, memcmp(dst, "abcdefg", 8));
     EXPECT_EQ(7U, base::wcslcpy(wdst, L"abcdefg", arraysize(wdst)));
     EXPECT_EQ(0, memcmp(wdst, L"abcdefg", sizeof(wchar_t) * 8));
@@ skipping 158 matching lines @@
   const std::string live = kLive;
   std::string dead = live;
   strncpy(WriteInto(&dead, 5), kDead, 4);
   EXPECT_EQ(kDead, dead);
   EXPECT_EQ(4u, dead.size());
   EXPECT_EQ(kLive, live);
   EXPECT_EQ(4u, live.size());
 }
 
 }  // namespace base