Use new people.get api instead of oauth2/v1/userinfo.

google_apis/gaia/gaia_constants.cc

Index: google_apis/gaia/gaia_constants.cc
diff --git a/google_apis/gaia/gaia_constants.cc b/google_apis/gaia/gaia_constants.cc
index 60546bf0d0e01a9bd7c3ed9f68ed41f00ae380d8..14a41c9e387c7be0308df58a07c2104447fd8820 100644
--- a/google_apis/gaia/gaia_constants.cc
+++ b/google_apis/gaia/gaia_constants.cc
@@ -45,6 +45,11 @@ const char kChromeSyncManagedOAuth2Scope[] =
 const char kGoogleTalkOAuth2Scope[] =
     "https://www.googleapis.com/auth/googletalk";
 
+const char kGoogleUserInfoEmail[] =
+    "https://www.googleapis.com/auth/userinfo.email";
+const char kGoogleUserInfoProfile[] =
+    "https://www.googleapis.com/auth/userinfo.profile";
+
 // Used to mint uber auth tokens when needed.
 const char kGaiaSid[] = "sid";
 const char kGaiaLsid[] = "lsid";