Fix some minor typos related to the word "accelerate" and its derivative.

chrome/browser/ui/panels/panel_browsertest.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 "base/bind.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/devtools/devtools_window.h"
@@ skipping 1671 matching lines @@
 
   // Create a test panel with web contents loaded.
   CreatePanelParams params("1", gfx::Rect(), SHOW_AS_ACTIVE);
   GURL url(ui_test_utils::GetTestUrl(
       base::FilePath(kTestDir),
       base::FilePath(FILE_PATH_LITERAL("update-preferred-size.html"))));
   params.url = url;
   Panel* panel = CreatePanelWithParams(params);
   EXPECT_EQ(1, panel_manager->num_panels());
 
-  // Close the panel by acclerator.
+  // Close the panel by accelerator.
   content::WindowedNotificationObserver signal(
       chrome::NOTIFICATION_PANEL_CLOSED,
       content::Source<Panel>(panel));
 #if defined(USE_AURA)
   double now = ui::EventTimeForNow().InSecondsF();
   content::NativeWebKeyboardEvent key_event(
       ui::ET_KEY_PRESSED,
       false,
       ui::VKEY_W,
       ui::EF_CONTROL_DOWN,
@@ skipping 69 matching lines @@
 #else
 #define MAYBE_FocusChangeEventOnMinimize FocusChangeEventOnMinimize
 #endif
 IN_PROC_BROWSER_TEST_F(PanelExtensionApiTest,
                        MAYBE_FocusChangeEventOnMinimize) {
   // This is needed so the subsequently created panels can be activated.
   // On a Mac, it transforms background-only test process into foreground one.
   ASSERT_TRUE(ui_test_utils::BringBrowserWindowToFront(browser()));
   ASSERT_TRUE(RunExtensionTest("panels/focus_change_on_minimize")) << message_;
 }