Make the new Gaia password separated signin flow modal.

chrome/browser/signin/signin_promo.h

Index: chrome/browser/signin/signin_promo.h
diff --git a/chrome/browser/signin/signin_promo.h b/chrome/browser/signin/signin_promo.h
index ad84b1642152a2b83a06c1e58e3fea2ce7fd9206..c4a77f9ad477166b7dee3695fd40ab2dcc00e745 100644
--- a/chrome/browser/signin/signin_promo.h
+++ b/chrome/browser/signin/signin_promo.h
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/basictypes.h"
+#include "chrome/browser/ui/profile_chooser_constants.h"
 #include "components/signin/core/browser/signin_metrics.h"
 
 class GURL;
@@ -67,6 +68,11 @@ GURL GetNextPageURLForPromoURL(const GURL& url);
 // Gets the partition URL for the embedded sign in frame/webview.
 GURL GetSigninPartitionURL();
 
+// Gets the signin URL to be used to display the sign in flow for |mode| in
+// |profile|.
+GURL GetSigninURLFromBubbleViewMode(Profile* profile,
+                                    profiles::BubbleViewMode mode);
+
 // Gets the source from the query portion of the sign in promo URL.
 // The source identifies from where the sign in promo was opened.
 signin_metrics::Source GetSourceForPromoURL(const GURL& url);