UMA statistics for Linux password storage backend usage

chrome/browser/password_manager/password_store_factory.h

Index: chrome/browser/password_manager/password_store_factory.h
diff --git a/chrome/browser/password_manager/password_store_factory.h b/chrome/browser/password_manager/password_store_factory.h
index 6a13e67a994affc2eda273308c9c8fda8d137825..2a625490a8834670eae9b6aa6a8c7b3142255125 100644
--- a/chrome/browser/password_manager/password_store_factory.h
+++ b/chrome/browser/password_manager/password_store_factory.h
@@ -11,6 +11,10 @@
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/keyed_service/core/service_access_type.h"
 
+#if defined(USE_X11)
+#include "base/nix/xdg_util.h"
+#endif
+
 class Profile;
 
 namespace password_manager {
@@ -73,6 +77,29 @@ class PasswordStoreFactory : public BrowserContextKeyedServiceFactory {
       content::BrowserContext* context) const override;
   bool ServiceIsNULLWhileTesting() const override;
 
+#if defined(USE_X11)
+  enum LinuxBackendUsage {
+    KDE_FLAG_KWALLET,
+    KDE_FLAG_PLAINTEXT,
+    KDE_NOFLAG_KWALLET,
+    KDE_NOFLAG_PLAINTEXT,
+    GNOME_FLAG_KEYRING,
+    GNOME_FLAG_LIBSECRET,
+    GNOME_FLAG_PLAINTEXT,
+    GNOME_NOFLAG_KEYRING,
+    GNOME_NOFLAG_LIBSECRET,
+    GNOME_NOFLAG_PLAINTEXT,
+    OTHER_PLAINTEXT,
+    MAX_BACKEND_USAGE_VALUE
+  };
+
+  enum LinuxBackendUsed { PLAINTEXT, GNOME_KEYRING, LIBSECRET, KWALLET };
+
+  static void RecordBackendStatistics(base::nix::DesktopEnvironment desktop_env,
+                                      const std::string& store_type,
+                                      LinuxBackendUsed used_backend);
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(PasswordStoreFactory);
 };