Standardize StringToInt{,64} interface.

chrome/browser/component_updater/component_updater_service.cc

Index: chrome/browser/component_updater/component_updater_service.cc
diff --git a/chrome/browser/component_updater/component_updater_service.cc b/chrome/browser/component_updater/component_updater_service.cc
index 6e2d98d195fe1790910da9bacdc1611cfa981486..699dbc506f6fa5d06050bbb4f7a15f8dad02dcfa 100644
--- a/chrome/browser/component_updater/component_updater_service.cc
+++ b/chrome/browser/component_updater/component_updater_service.cc
@@ -15,6 +15,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
+#include "base/string_piece.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/timer.h"
@@ -74,10 +75,13 @@ static std::string HexStringToID(const std::string& hexstr) {
   std::string id;
   for (size_t i = 0; i < hexstr.size(); ++i) {
     int val;
-    if (base::HexStringToInt(hexstr.begin() + i, hexstr.begin() + i + 1, &val))
+    if (base::HexStringToInt(base::StringPiece(hexstr.begin() + i,
+                                               hexstr.begin() + i + 1),
+                             &val)) {
       id.append(1, val + 'a');
-    else
+    } else {
       id.append(1, 'a');
+    }
   }
   DCHECK(Extension::IdIsValid(id));
   return id;