Remove WCHAR_T_IS_UNSIGNED definition

base/strings/string_util_unittest.cc

Index: base/strings/string_util_unittest.cc
diff --git a/base/strings/string_util_unittest.cc b/base/strings/string_util_unittest.cc
index e447cdc39024cce1eebc3e9932a3d61602a54d3b..4ea9069a255a82d76c8294245cd1139f4959ee61 100644
--- a/base/strings/string_util_unittest.cc
+++ b/base/strings/string_util_unittest.cc
@@ -1011,13 +1011,8 @@ TEST(StringUtilTest, LcpyTest) {
     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.