[Tutorials, a11y] Prompt 'focus inactive bubble' accelerator on ChromeOS

Because not all chromebooks have function keys, the ALT+SHIFT+A
accelerator (which has the same function with help bubbles) is a better
choice to prompt screen reader users to use.

Because the text of the accelerator message is auto-generated from the
accelerator name, no l10n changes are needed to update the prompt.

(cherry picked from commit 73c279c)

Bug: 1316670
Change-Id: Ia909fb1bd3db5802fff47d2988ccabe329678aa8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3588733
Auto-Submit: Dana Fried <dfried@chromium.org>
Reviewed-by: David Pennington <dpenning@chromium.org>
Commit-Queue: David Pennington <dpenning@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#993350}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3600201
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Dana Fried <dfried@chromium.org>
Cr-Commit-Position: refs/branch-heads/5005@{#84}
Cr-Branched-From: 5b4d945-refs/heads/main@{#992738}

chrome/browser/ui/views/user_education/browser_feature_promo_controller.cc

@@ -6,6 +6,7 @@
 
 #include <string>
 
+#include "build/build_config.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/views/user_education/help_bubble_factory_views.h"
@@ -93,7 +94,15 @@ std::u16string BrowserFeaturePromoController::GetTutorialScreenReaderHint()
     const {
   ui::Accelerator accelerator;
   std::u16string accelerator_text;
-  if (browser_view_->GetAccelerator(IDC_FOCUS_NEXT_PANE, &accelerator)) {
+#if BUILDFLAG(IS_CHROMEOS)
+  // IDC_FOCUS_NEXT_PANE still reports as F6 on ChromeOS, but many ChromeOS
+  // devices do not have function keys. Therefore, instead prompt the other
+  // accelerator that does the same thing.
+  static const auto kAccelerator = IDC_FOCUS_INACTIVE_POPUP_FOR_ACCESSIBILITY;
+#else
+  static const auto kAccelerator = IDC_FOCUS_NEXT_PANE;
+#endif
+  if (browser_view_->GetAccelerator(kAccelerator, &accelerator)) {
     accelerator_text = accelerator.GetShortcutText();
   } else {
     NOTREACHED();