Revert 114929 - Standardize StringToInt{,64} interface.

chrome/common/extensions/extension.cc

Index: chrome/common/extensions/extension.cc
===================================================================
--- chrome/common/extensions/extension.cc	(revision 114929)
+++ chrome/common/extensions/extension.cc	(working copy)
@@ -17,7 +17,6 @@
 #include "base/stl_util.h"
 #include "base/string16.h"
 #include "base/string_number_conversions.h"
-#include "base/string_piece.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
@@ -80,13 +79,10 @@
 static void ConvertHexadecimalToIDAlphabet(std::string* id) {
   for (size_t i = 0; i < id->size(); ++i) {
     int val;
-    if (base::HexStringToInt(base::StringPiece(id->begin() + i,
-                                               id->begin() + i + 1),
-                             &val)) {
+    if (base::HexStringToInt(id->begin() + i, id->begin() + i + 1, &val))
       (*id)[i] = val + 'a';
-    } else {
+    else
       (*id)[i] = 'a';
-    }
   }
 }