Implementation of PasswordStoreSigninNotifier.

Implemented PasswordStoreSigninNotifier for passing Chrome sign-in events to PasswordStore.

BUG=657041

Review-Url: https://codereview.chromium.org/2916573002
Cr-Commit-Position: refs/heads/master@{#483663}
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index c183606..6ae9ed5 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -3933,6 +3933,13 @@
       "chrome_browser_main_extra_parts_exo.h",
     ]
   }
+
+  if (is_win || is_mac || (is_linux && !is_chromeos)) {
+    sources += [
+      "password_manager/password_store_signin_notifier_impl.cc",
+      "password_manager/password_store_signin_notifier_impl.h",
+    ]
+  }
 }
 
 if (is_android) {