Use GetSwitchValueASCII.

chrome/browser/sessions/session_restore.cc

Index: chrome/browser/sessions/session_restore.cc
diff --git a/chrome/browser/sessions/session_restore.cc b/chrome/browser/sessions/session_restore.cc
index 6db85163b78fe16658ca9600f0bf90bf2094fba2..36bc224397ec76548c354a78766c4dba85c0dbbd 100644
--- a/chrome/browser/sessions/session_restore.cc
+++ b/chrome/browser/sessions/session_restore.cc
@@ -365,11 +365,11 @@ class SessionRestoreImpl : public NotificationObserver {
                            bool pin_tabs) {
     int pin_count = 0;
     if (pin_tabs) {
-      std::wstring pin_count_string =
-          CommandLine::ForCurrentProcess()->GetSwitchValue(
+      std::string pin_count_string =
+          CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
               switches::kPinnedTabCount);
       if (!pin_count_string.empty())
-        pin_count = StringToInt(WideToUTF16Hack(pin_count_string));
+        pin_count = StringToInt(pin_count_string);
     }
 
     for (size_t i = 0; i < urls.size(); ++i) {