Diagnostics: Update select dialog title

Screenshot: http://shortn/_ekjQ4Dqzds

Bug: 1128204
Test: chromeos_components_unittests --gtest_filter=*SessionLog*
Change-Id: If40fb5ed6422e692f0715343167811a915543e14
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2687750
Reviewed-by: Bailey Berro <baileyberro@chromium.org>
Commit-Queue: Michael Checo <michaelcheco@google.com>
Cr-Commit-Position: refs/heads/master@{#853203}

Author: Michael Checo

chromeos/chromeos_strings.grd

@@ -815,6 +815,9 @@ Try tapping the mic to ask me anything.
       <message name="IDS_DIAGNOSTICS_SESSION_LOG_TOAST_TEXT_FAILURE" desc="The text shown when the session log download fails.">
         Download failed
       </message>
+      <message name="IDS_DIAGNOSTICS_SELECT_DIALOG_TITLE" desc="The text used as the title of the select dialog used for choosing the folder to save the session log to.">
+        Select a folder to save to
+      </message>
 
       <!-- Quick Answers -->
       <message name="IDS_QUICK_ANSWERS_DEFINITION_TITLE_TEXT" desc="The title text format string used for Quick Answers definition result card. The first placeholder contains the source query text and the second placeholder contains the phonetics.">

chromeos/chromeos_strings_grd/IDS_DIAGNOSTICS_SELECT_DIALOG_TITLE.png.sha1

@@ -0,0 +1 @@
+499dccba6f568535a06cab27239999fa1b3c07be

chromeos/components/diagnostics_ui/backend/BUILD.gn

@@ -38,6 +38,7 @@ static_library("backend") {
     "//chromeos/dbus/power:power_manager_proto",
     "//chromeos/services/cros_healthd/public/cpp",
     "//chromeos/services/cros_healthd/public/mojom",
+    "//chromeos/strings/",
     "//content/public/browser",
     "//services/data_decoder/public/cpp",
     "//ui/base",

chromeos/components/diagnostics_ui/backend/session_log_handler.cc

@@ -7,12 +7,13 @@
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/strings/strcat.h"
-#include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chromeos/components/diagnostics_ui/backend/routine_log.h"
 #include "chromeos/components/diagnostics_ui/backend/telemetry_log.h"
+#include "chromeos/strings/grit/chromeos_strings.h"
 #include "content/public/browser/web_contents.h"
+#include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/shell_dialogs/select_file_policy.h"
 
@@ -107,10 +108,9 @@ void SessionLogHandler::HandleSaveSessionLogRequest(
 
   select_file_dialog_ = ui::SelectFileDialog::Create(
       this, select_file_policy_creator_.Run(web_contents));
-  // TODO(michaelcheco): Add string for dialog title.
   select_file_dialog_->SelectFile(
       ui::SelectFileDialog::SELECT_SAVEAS_FILE,
-      /*title=*/base::ASCIIToUTF16(""),
+      /*title=*/l10n_util::GetStringUTF16(IDS_DIAGNOSTICS_SELECT_DIALOG_TITLE),
       /*default_path=*/base::FilePath(kDefaultSessionLogFileName),
       /*file_types=*/nullptr,
       /*file_type_index=*/0,