Add ToString() methods to classes with << operators, preparing for deprecations.

Bug: webrtc:8982
Change-Id: I9b8792a229539dd9848f4d9936fe343f4bf9ad49
Reviewed-on: https://webrtc-review.googlesource.com/63200
Commit-Queue: Jonas Olsson <jonasolsson@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22705}
diff --git a/rtc_base/stringutils_unittest.cc b/rtc_base/stringutils_unittest.cc
index 85d0c3c..bb0e7b5 100644
--- a/rtc_base/stringutils_unittest.cc
+++ b/rtc_base/stringutils_unittest.cc
@@ -16,10 +16,10 @@
 // Tests for string_match().
 
 TEST(string_matchTest, Matches) {
-  EXPECT_TRUE( string_match("A.B.C.D", "a.b.c.d"));
-  EXPECT_TRUE( string_match("www.TEST.GOOGLE.COM", "www.*.com"));
-  EXPECT_TRUE( string_match("127.0.0.1",  "12*.0.*1"));
-  EXPECT_TRUE( string_match("127.1.0.21", "12*.0.*1"));
+  EXPECT_TRUE(string_match("A.B.C.D", "a.b.c.d"));
+  EXPECT_TRUE(string_match("www.TEST.GOOGLE.COM", "www.*.com"));
+  EXPECT_TRUE(string_match("127.0.0.1",  "12*.0.*1"));
+  EXPECT_TRUE(string_match("127.1.0.21", "12*.0.*1"));
   EXPECT_FALSE(string_match("127.0.0.0",  "12*.0.*1"));
   EXPECT_FALSE(string_match("127.0.0.0",  "12*.0.*1"));
   EXPECT_FALSE(string_match("127.1.1.21", "12*.0.*1"));
@@ -75,7 +75,7 @@
   EXPECT_EQ(1, ascii_string_compare(L"xyz", "xy", 5, identity));
   EXPECT_EQ(1, ascii_string_compare(L"abc", "ABB", 5, tolowercase));
 }
-#endif  // WEBRTC_WIN 
+#endif  // WEBRTC_WIN
 
 TEST(string_trim_Test, Trimming) {
   EXPECT_EQ("temp", string_trim("\n\r\t temp \n\r\t"));
@@ -105,4 +105,10 @@
   EXPECT_FALSE(ends_with("", "f"));
 }
 
-} // namespace rtc
+TEST(string_toHexTest, ToHex) {
+  EXPECT_EQ(ToHex(0), "0");
+  EXPECT_EQ(ToHex(0X1243E), "1243e");
+  EXPECT_EQ(ToHex(-20), "ffffffec");
+}
+
+}  // namespace rtc