Mac: Use "esc" rather than "Esc" in "Press Esc to exit full screen".

chrome/browser/ui/views/exclusive_access_bubble_views.cc

 // Copyright (c) 2012 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/exclusive_access_bubble_views.h"
 
 #include <utility>
 
+#include "base/i18n/case_conversion.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/ui/exclusive_access/exclusive_access_manager.h"
 #include "chrome/browser/ui/exclusive_access/fullscreen_controller.h"
@@ skipping 149 matching lines @@
       bubble_type ==
           EXCLUSIVE_ACCESS_BUBBLE_TYPE_EXTENSION_FULLSCREEN_EXIT_INSTRUCTION) {
     accelerator = browser_fullscreen_exit_accelerator_;
   } else {
     accelerator = l10n_util::GetStringUTF16(IDS_APP_ESC_KEY);
     if (bubble_type !=
         EXCLUSIVE_ACCESS_BUBBLE_TYPE_FULLSCREEN_EXIT_INSTRUCTION) {
       link_visible = false;
     }
   }
+#if defined(OS_MACOSX)
+  // Mac keyboards use lowercase for everything except function keys, which are
+  // typically reserved for system use. Since |accelerator| is placed in a box
+  // to make it look like a keyboard key it looks weird to not follow suit.
+  accelerator = base::i18n::ToLower(accelerator);
+#endif
   base::string16 link_text;
   base::string16 exit_instruction_text;
   if (link_visible) {
     link_text = l10n_util::GetStringUTF16(IDS_EXIT_FULLSCREEN_MODE);
 #if !defined(OS_CHROMEOS)
     link_text += base::UTF8ToUTF16(" ") +
                  l10n_util::GetStringFUTF16(
                      IDS_EXIT_FULLSCREEN_MODE_ACCELERATOR, accelerator);
 #endif
   } else {
@@ skipping 90 matching lines @@
 void ExclusiveAccessBubbleViews::OnWidgetVisibilityChanged(
     views::Widget* widget,
     bool visible) {
   UpdateMouseWatcher();
 }
 
 void ExclusiveAccessBubbleViews::LinkClicked(views::Link* link,
                                              int event_flags) {
   ExitExclusiveAccess();
 }