Update ToLower/UpperASCII API

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 eb6cd7ecfc14d873e3b88d8af1b34dd031e88a22..187e49e6698160e5629283371766f3df4629b09a 100644
--- a/base/strings/string_util_unittest.cc
+++ b/base/strings/string_util_unittest.cc
@@ -503,30 +503,30 @@ TEST(StringUtilTest, ConvertASCII) {
   EXPECT_EQ(0, string_with_nul.compare(narrow_with_nul));
 }
 
+TEST(StringUtilTest, ToLowerASCII) {
+  EXPECT_EQ('c', ToLowerASCII('C'));
+  EXPECT_EQ('c', ToLowerASCII('c'));
+  EXPECT_EQ('2', ToLowerASCII('2'));
+
+  EXPECT_EQ(static_cast<char16>('c'), ToLowerASCII(static_cast<char16>('C')));
+  EXPECT_EQ(static_cast<char16>('c'), ToLowerASCII(static_cast<char16>('c')));
+  EXPECT_EQ(static_cast<char16>('2'), ToLowerASCII(static_cast<char16>('2')));
+
+  EXPECT_EQ("cc2", ToLowerASCII("Cc2"));
+  EXPECT_EQ(ASCIIToUTF16("cc2"), ToLowerASCII(ASCIIToUTF16("Cc2")));
+}
+
 TEST(StringUtilTest, ToUpperASCII) {
   EXPECT_EQ('C', ToUpperASCII('C'));
   EXPECT_EQ('C', ToUpperASCII('c'));
   EXPECT_EQ('2', ToUpperASCII('2'));
 
-  EXPECT_EQ(L'C', ToUpperASCII(L'C'));
-  EXPECT_EQ(L'C', ToUpperASCII(L'c'));
-  EXPECT_EQ(L'2', ToUpperASCII(L'2'));
-
-  std::string in_place_a("Cc2");
-  StringToUpperASCII(&in_place_a);
-  EXPECT_EQ("CC2", in_place_a);
-
-  std::wstring in_place_w(L"Cc2");
-  StringToUpperASCII(&in_place_w);
-  EXPECT_EQ(L"CC2", in_place_w);
-
-  std::string original_a("Cc2");
-  std::string upper_a = StringToUpperASCII(original_a);
-  EXPECT_EQ("CC2", upper_a);
+  EXPECT_EQ(static_cast<char16>('C'), ToUpperASCII(static_cast<char16>('C')));
+  EXPECT_EQ(static_cast<char16>('C'), ToUpperASCII(static_cast<char16>('c')));
+  EXPECT_EQ(static_cast<char16>('2'), ToUpperASCII(static_cast<char16>('2')));
 
-  std::wstring original_w(L"Cc2");
-  std::wstring upper_w = StringToUpperASCII(original_w);
-  EXPECT_EQ(L"CC2", upper_w);
+  EXPECT_EQ("CC2", ToUpperASCII("Cc2"));
+  EXPECT_EQ(ASCIIToUTF16("CC2"), ToUpperASCII(ASCIIToUTF16("Cc2")));
 }
 
 TEST(StringUtilTest, LowerCaseEqualsASCII) {