[Password Manager] Add UMA stats to track interaction with synced accounts.

chrome/browser/ui/passwords/password_manager_presenter.cc

Index: chrome/browser/ui/passwords/password_manager_presenter.cc
diff --git a/chrome/browser/ui/passwords/password_manager_presenter.cc b/chrome/browser/ui/passwords/password_manager_presenter.cc
index a8d96a7f1fdba7d90f95743443d5cc3103ba6e9d..e8ec2baeace3f682b93070262b294c7cf1d49e63 100644
--- a/chrome/browser/ui/passwords/password_manager_presenter.cc
+++ b/chrome/browser/ui/passwords/password_manager_presenter.cc
@@ -6,11 +6,14 @@
 
 #include "base/bind.h"
 #include "base/command_line.h"
+#include "base/metrics/user_metrics_action.h"
 #include "base/prefs/pref_service.h"
+#include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "chrome/browser/password_manager/password_manager_util.h"
 #include "chrome/browser/password_manager/password_store_factory.h"
+#include "chrome/browser/password_manager/sync_metrics.h"
 #include "chrome/browser/ui/passwords/password_ui_view.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/url_constants.h"
@@ -125,6 +128,15 @@ void PasswordManagerPresenter::RequestShowPassword(size_t index) {
     else
       return;
   }
+
+  if (password_manager_sync_metrics::IsPasswordSyncAccountCredential(
+          password_view_->GetProfile(),
+          UTF16ToUTF8(password_list_[index]->username_value),
+          password_list_[index]->signon_realm)) {
+    content::RecordAction(
+        base::UserMetricsAction("PasswordManager_SyncCredentialShown"));
+  }
+
   // Call back the front end to reveal the password.
   password_view_->ShowPassword(index, password_list_[index]->password_value);
 #endif