Move RemoveChars, ReplaceChars, TrimString, and TruncateUTF8ToByteSize to base namespace.

chromeos/system/name_value_pairs_parser.cc

Index: chromeos/system/name_value_pairs_parser.cc
diff --git a/chromeos/system/name_value_pairs_parser.cc b/chromeos/system/name_value_pairs_parser.cc
index 31ba010de1fa1c68f33a1475430b76ec1842a3fa..b5e11f4c51a6ac925ae75bb1dc1a055092d67e9f 100644
--- a/chromeos/system/name_value_pairs_parser.cc
+++ b/chromeos/system/name_value_pairs_parser.cc
@@ -91,8 +91,8 @@ bool NameValuePairsParser::ParseNameValuePairsWithComments(
 
       std::string key;
       std::string value;
-      TrimString(pair.substr(0, eq_pos), kTrimChars, &key);
-      TrimString(pair.substr(eq_pos + 1, value_size), kTrimChars, &value);
+      base::TrimString(pair.substr(0, eq_pos), kTrimChars, &key);
+      base::TrimString(pair.substr(eq_pos + 1, value_size), kTrimChars, &value);
 
       if (!key.empty()) {
         AddNameValuePair(key, value);