HexStringToUInt64 should fail for negative input

base/strings/string_number_conversions_unittest.cc

Index: base/strings/string_number_conversions_unittest.cc
diff --git a/base/strings/string_number_conversions_unittest.cc b/base/strings/string_number_conversions_unittest.cc
index 937bfb8e1550c8ad892006c7bcbd7808702921c6..4d413d768ac5a35d41e2ca14245a06904d86f0e7 100644
--- a/base/strings/string_number_conversions_unittest.cc
+++ b/base/strings/string_number_conversions_unittest.cc
@@ -317,25 +317,25 @@ TEST(StringNumberConversionsTest, HexStringToUInt64) {
   } cases[] = {
     {"0", 0, true},
     {"42", 66, true},
-    {"-42", static_cast<uint64>(-66), true},
+    {"-42", 0, false},
     {"+42", 66, true},
     {"40acd88557b", GG_INT64_C(4444444448123), true},
     {"7fffffff", INT_MAX, true},
-    {"-80000000", static_cast<uint64>(INT_MIN), true},
+    {"-80000000", 0, false},
     {"ffffffff", 0xffffffff, true},
     {"DeadBeef", 0xdeadbeef, true},
     {"0x42", 66, true},
-    {"-0x42", static_cast<uint64>(-66), true},
+    {"-0x42", 0, false},
     {"+0x42", 66, true},
     {"0x40acd88557b", GG_INT64_C(4444444448123), true},
     {"0x7fffffff", INT_MAX, true},
-    {"-0x80000000", static_cast<uint64>(INT_MIN), true},
+    {"-0x80000000", 0, false},
     {"0xffffffff", 0xffffffff, true},
     {"0XDeadBeef", 0xdeadbeef, true},
     {"0x7fffffffffffffff", kint64max, true},
-    {"-0x8000000000000000", GG_UINT64_C(0x8000000000000000), true},
+    {"-0x8000000000000000", 0, false},
     {"0x8000000000000000", GG_UINT64_C(0x8000000000000000), true},
-    {"-0x8000000000000001", GG_UINT64_C(0x7fffffffffffffff), true},
+    {"-0x8000000000000001", 0, false},
     {"0xFFFFFFFFFFFFFFFF", kuint64max, true},
     {"FFFFFFFFFFFFFFFF", kuint64max, true},
     {"0x0000000000000000", 0, true},