[Extensions] Use base::StringPiece in ErrorUtils

extensions/common/error_utils.cc

Index: extensions/common/error_utils.cc
diff --git a/extensions/common/error_utils.cc b/extensions/common/error_utils.cc
index 14ca2a96c2f8aca36f5885c7e27845bbf4aa8aca..f8f04b7c617e27d0bb6d6f637e4c0851c3a79310 100644
--- a/extensions/common/error_utils.cc
+++ b/extensions/common/error_utils.cc
@@ -9,48 +9,48 @@
 
 namespace extensions {
 
-std::string ErrorUtils::FormatErrorMessage(const std::string& format,
-                                           const std::string& s1) {
-  std::string ret_val = format;
+std::string ErrorUtils::FormatErrorMessage(base::StringPiece format,
+                                           base::StringPiece s1) {
+  std::string ret_val = format.as_string();
   base::ReplaceFirstSubstringAfterOffset(&ret_val, 0, "*", s1);
   return ret_val;
 }
 
-std::string ErrorUtils::FormatErrorMessage(const std::string& format,
-                                           const std::string& s1,
-                                           const std::string& s2) {
-  std::string ret_val = format;
+std::string ErrorUtils::FormatErrorMessage(base::StringPiece format,
+                                           base::StringPiece s1,
+                                           base::StringPiece s2) {
+  std::string ret_val = format.as_string();
   base::ReplaceFirstSubstringAfterOffset(&ret_val, 0, "*", s1);
   base::ReplaceFirstSubstringAfterOffset(&ret_val, 0, "*", s2);
   return ret_val;
 }
 
-std::string ErrorUtils::FormatErrorMessage(const std::string& format,
-                                           const std::string& s1,
-                                           const std::string& s2,
-                                           const std::string& s3) {
-  std::string ret_val = format;
+std::string ErrorUtils::FormatErrorMessage(base::StringPiece format,
+                                           base::StringPiece s1,
+                                           base::StringPiece s2,
+                                           base::StringPiece s3) {
+  std::string ret_val = format.as_string();
   base::ReplaceFirstSubstringAfterOffset(&ret_val, 0, "*", s1);
   base::ReplaceFirstSubstringAfterOffset(&ret_val, 0, "*", s2);
   base::ReplaceFirstSubstringAfterOffset(&ret_val, 0, "*", s3);
   return ret_val;
 }
 
-base::string16 ErrorUtils::FormatErrorMessageUTF16(const std::string& format,
-                                                   const std::string& s1) {
+base::string16 ErrorUtils::FormatErrorMessageUTF16(base::StringPiece format,
+                                                   base::StringPiece s1) {
   return base::UTF8ToUTF16(FormatErrorMessage(format, s1));
 }
 
-base::string16 ErrorUtils::FormatErrorMessageUTF16(const std::string& format,
-                                                   const std::string& s1,
-                                                   const std::string& s2) {
+base::string16 ErrorUtils::FormatErrorMessageUTF16(base::StringPiece format,
+                                                   base::StringPiece s1,
+                                                   base::StringPiece s2) {
   return base::UTF8ToUTF16(FormatErrorMessage(format, s1, s2));
 }
 
-base::string16 ErrorUtils::FormatErrorMessageUTF16(const std::string& format,
-                                                   const std::string& s1,
-                                                   const std::string& s2,
-                                                   const std::string& s3) {
+base::string16 ErrorUtils::FormatErrorMessageUTF16(base::StringPiece format,
+                                                   base::StringPiece s1,
+                                                   base::StringPiece s2,
+                                                   base::StringPiece s3) {
   return base::UTF8ToUTF16(FormatErrorMessage(format, s1, s2, s3));
 }