Make 'Google Smart Lock' a hyperlink in the password infobar on Mac.

components/infobars/core/confirm_infobar_delegate.h

Index: components/infobars/core/confirm_infobar_delegate.h
diff --git a/components/infobars/core/confirm_infobar_delegate.h b/components/infobars/core/confirm_infobar_delegate.h
index d36ea224a272009f16eb86c784a12442358af7fc..516873ac1f60f49b74193fa313dcd55d95e13a73 100644
--- a/components/infobars/core/confirm_infobar_delegate.h
+++ b/components/infobars/core/confirm_infobar_delegate.h
@@ -9,6 +9,7 @@
 #include "base/strings/string16.h"
 #include "components/infobars/core/infobar_delegate.h"
 #include "components/infobars/core/infobar_manager.h"
+#include "ui/gfx/range/range.h"
 
 namespace infobars {
 class InfoBar;
@@ -33,6 +34,9 @@ class ConfirmInfoBarDelegate : public infobars::InfoBarDelegate {
   // Returns the message string to be displayed for the InfoBar.
   virtual base::string16 GetMessageText() const = 0;
 
+  // Defines the message substring to be displayed as a link.
+  virtual gfx::Range GetMessageLinkRange() const;
+
   // Returns the buttons to be shown for this InfoBar.
   virtual int GetButtons() const;
 
@@ -54,8 +58,8 @@ class ConfirmInfoBarDelegate : public infobars::InfoBarDelegate {
   // in handling this call something triggers the infobar to begin closing.
   virtual bool Cancel();
 
-  // Returns the text of the link to be displayed, if any. Otherwise returns
-  // and empty string.
+  // Returns the text of the link to be displayed after the message, if
+  // any. Otherwise returns and empty string.

[gone, 2015/06/05 17:44:25]

nit: while you're here, and -> an

   virtual base::string16 GetLinkText() const;
 
   // Called when the Link (if any) is clicked. The |disposition| specifies how