Convert Pass()→std::move() in //chrome

chrome/browser/signin/chrome_signin_client.cc

Index: chrome/browser/signin/chrome_signin_client.cc
diff --git a/chrome/browser/signin/chrome_signin_client.cc b/chrome/browser/signin/chrome_signin_client.cc
index f4804e79d02a78bbb9a58bb243d86414ee6eff72..58dd05b4fe38861f1de0ac7705e002a1bf959264 100644
--- a/chrome/browser/signin/chrome_signin_client.cc
+++ b/chrome/browser/signin/chrome_signin_client.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/signin/chrome_signin_client.h"
 
 #include <stddef.h>
+#include <utility>
 
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
@@ -230,7 +231,7 @@ ChromeSigninClient::AddCookieChangedCallback(
   DCHECK(context_getter.get());
   scoped_ptr<SigninCookieChangedSubscription> subscription(
       new SigninCookieChangedSubscription(context_getter, url, name, callback));
-  return subscription.Pass();
+  return std::move(subscription);
 }
 
 void ChromeSigninClient::OnSignedIn(const std::string& account_id,