a11y/Mac: Add screenreader support for SubtleNotificationView announcements.

chrome/browser/ui/views/new_back_shortcut_bubble.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/new_back_shortcut_bubble.h"
 
 #include <utility>
 
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 44 matching lines @@
 }
 
 void NewBackShortcutBubble::UpdateContent(bool forward) {
   // Note: The key names are parameters so that we can vary by operating system
   // or change the direction of the arrow as necessary (see
   // https://crbug.com/612685).
 
 #if defined(OS_MACOSX)
   // U+2318 = PLACE OF INTEREST SIGN (Mac Command symbol).
   base::string16 accelerator = base::WideToUTF16(L"\x2318");
+  base::string16 accessible_accelerator =
+      l10n_util::GetStringUTF16(IDS_MAC_COMMAND_KEY_DESCRIPTION);
 #else
   base::string16 accelerator = l10n_util::GetStringUTF16(IDS_APP_ALT_KEY);
+  base::string16 accessible_accelerator = accelerator;
 #endif
 
   int message_id = forward ? IDS_PRESS_ALT_RIGHT_TO_GO_FORWARD
                            : IDS_PRESS_ALT_LEFT_TO_GO_BACK;
   // U+2192 = RIGHTWARDS ARROW; U+2190 = LEFTWARDS ARROW.
   base::string16 arrow_key = base::WideToUTF16(forward ? L"\x2192" : L"\x2190");
+  base::string16 accessible_arrow_key =
+      forward ? l10n_util::GetStringUTF16(IDS_APP_RIGHT_ARROW_KEY)
+              : l10n_util::GetStringUTF16(IDS_APP_LEFT_ARROW_KEY);
+  view_->SetAccessibleName(l10n_util::GetStringFUTF16(
+      message_id, accessible_accelerator, accessible_arrow_key));
   view_->UpdateContent(
       l10n_util::GetStringFUTF16(message_id, accelerator, arrow_key),
       base::string16());
 
   view_->SetSize(GetPopupRect(true).size());
   popup_->SetBounds(GetPopupRect(false));
 
   // Show the bubble.
   animation_->SetSlideDuration(kSlideInDurationMs);
   animation_->Show();
@@ skipping 35 matching lines @@
   int desired_top = kPopupTopPx - view_->border()->GetInsets().top();
   int y = widget_bounds.y() + desired_top;
   return gfx::Rect(gfx::Point(x, y), size);
 }
 
 void NewBackShortcutBubble::OnTimerElapsed() {
   // Hide the bubble.
   animation_->SetSlideDuration(kSlideOutDurationMs);
   animation_->Hide();
 }