Initialize chrome::DIR_USER_DATA early on for service processes, etc.

chrome/browser/ui/startup/bad_flags_prompt.cc

Index: chrome/browser/ui/startup/bad_flags_prompt.cc
diff --git a/chrome/browser/ui/startup/bad_flags_prompt.cc b/chrome/browser/ui/startup/bad_flags_prompt.cc
index a3333e7ca28e2ce7030eb7dafd5e70c279260678..3614113034cc3ec939de959baca57f3edc5367cf 100644
--- a/chrome/browser/ui/startup/bad_flags_prompt.cc
+++ b/chrome/browser/ui/startup/bad_flags_prompt.cc
@@ -5,16 +5,23 @@
 #include "chrome/browser/ui/startup/bad_flags_prompt.h"
 
 #include "base/command_line.h"
+#include "base/files/file_path.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/infobars/simple_alert_infobar_delegate.h"
 #include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/simple_message_box.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
+#include "chrome/common/switch_utils.h"
+#include "components/startup_metric_utils/startup_metric_utils.h"
 #include "components/translate/core/common/translate_switches.h"
 #include "extensions/common/switches.h"
+#include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
+#include "ui/base/resource/resource_bundle.h"
 
 namespace chrome {
 
@@ -59,4 +66,35 @@ void ShowBadFlagsPrompt(Browser* browser) {
   }
 }
 
+void MaybeShowInvalidUserDataDirWarningDialog() {
+  const base::FilePath& user_data_dir = GetInvalidSpecifiedUserDataDir();
+  if (user_data_dir.empty())
+    return;
+
+  startup_metric_utils::SetNonBrowserUIDisplayed();
+
+  // Ensure the ResourceBundle is initialized for string resource access.
+  bool cleanup_resource_bundle = false;
+  if (!ResourceBundle::HasSharedInstance()) {
+    cleanup_resource_bundle = true;
+    std::string locale = l10n_util::GetApplicationLocale(std::string());
+    const char kUserDataDirDialogFallbackLocale[] = "en-US";
+    if (locale.empty())
+      locale = kUserDataDirDialogFallbackLocale;
+    ResourceBundle::InitSharedInstanceWithLocale(locale, NULL);
+  }
+
+  const base::string16& title =
+      l10n_util::GetStringUTF16(IDS_CANT_WRITE_USER_DIRECTORY_TITLE);
+  const base::string16& message =
+      l10n_util::GetStringFUTF16(IDS_CANT_WRITE_USER_DIRECTORY_SUMMARY,
+                                 user_data_dir.LossyDisplayName());
+
+  if (cleanup_resource_bundle)
+    ResourceBundle::CleanupSharedInstance();
+
+  // More complex dialogs cannot be shown before the earliest calls here.
+  ShowMessageBox(NULL, title, message, chrome::MESSAGE_BOX_TYPE_WARNING);
+}
+
 }  // namespace chrome