Standardize StringToInt{,64} interface.

chrome/browser/profiles/profile_info_cache.cc

Index: chrome/browser/profiles/profile_info_cache.cc
diff --git a/chrome/browser/profiles/profile_info_cache.cc b/chrome/browser/profiles/profile_info_cache.cc
index 1816a44642fbf56010160614aa410c8da1cd81ef..8a0fcecb6e03fa3a9b293776f71b8207e76ba6e8 100644
--- a/chrome/browser/profiles/profile_info_cache.cc
+++ b/chrome/browser/profiles/profile_info_cache.cc
@@ -13,6 +13,7 @@
 #include "base/rand_util.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
+#include "base/string_piece.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
@@ -31,6 +32,7 @@
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/image/image_util.h"
 
+using base::StringPiece;
 using content::BrowserThread;
 
 namespace {
@@ -669,8 +671,8 @@ bool ProfileInfoCache::IsDefaultAvatarIconUrl(const std::string& url,
     return false;
 
   int int_value = -1;
-  if (base::StringToInt(url.begin() + strlen(kDefaultUrlPrefix),
-                        url.end(),
+  if (base::StringToInt(StringPiece(url.begin() + strlen(kDefaultUrlPrefix),
+                                    url.end()),
                         &int_value)) {
     if (int_value < 0 ||
         int_value >= static_cast<int>(kDefaultAvatarIconsCount))