Modified the behavior of "Hide Toolbar in Full Screen"

chrome/browser/ui/cocoa/browser_window_controller_browsertest.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 
 #include <stddef.h>
 #import "base/mac/mac_util.h"
 
 #include "base/mac/sdk_forward_declarations.h"
@@ skipping 679 matching lines @@
 
 // Tests that the omnibox and tabs are hidden/visible in fullscreen mode.
 // Ensure that when the user toggles this setting, the omnibox, tabs and
 // preferences are updated correctly.
 IN_PROC_BROWSER_TEST_F(BrowserWindowControllerTest,
                        FullscreenToolbarIsVisibleAccordingToPrefs) {
   // This feature is only available on SystemFullscreen.
   if (!chrome::mac::SupportsSystemFullscreen())
     return;
 
   // Tests that the preference is set to false by default.

[msw, 2016/03/01 00:07:15]

nit: update comment

[spqchan, 2016/03/01 17:50:18]

Done.

   PrefService* prefs = browser()->profile()->GetPrefs();
-  EXPECT_FALSE(prefs->GetBoolean(prefs::kHideFullscreenToolbar));
+  EXPECT_TRUE(prefs->GetBoolean(prefs::kShowFullscreenToolbar));
 
   // Toggle fullscreen and check if the toolbar is shown.
   ToggleFullscreenAndWaitForNotification();
   VerifyFullscreenToolbarVisibility(fullscreen_mac::OMNIBOX_TABS_PRESENT);
 
   // Toggle the visibility of the fullscreen toolbar. Verify that the toolbar
   // is hidden and the preference is correctly updated.
   [[controller() presentationModeController] setToolbarFraction:0.0];
   chrome::ExecuteCommand(browser(), IDC_TOGGLE_FULLSCREEN_TOOLBAR);
-  EXPECT_TRUE(prefs->GetBoolean(prefs::kHideFullscreenToolbar));
+  EXPECT_FALSE(prefs->GetBoolean(prefs::kShowFullscreenToolbar));
   VerifyFullscreenToolbarVisibility(fullscreen_mac::OMNIBOX_TABS_HIDDEN);
 
   // Toggle out and back into fullscreen and verify that the toolbar is still
   // hidden.
   ToggleFullscreenAndWaitForNotification();
   ToggleFullscreenAndWaitForNotification();
   VerifyFullscreenToolbarVisibility(fullscreen_mac::OMNIBOX_TABS_HIDDEN);
 
   chrome::ExecuteCommand(browser(), IDC_TOGGLE_FULLSCREEN_TOOLBAR);
-  EXPECT_FALSE(prefs->GetBoolean(prefs::kHideFullscreenToolbar));
+  EXPECT_TRUE(prefs->GetBoolean(prefs::kShowFullscreenToolbar));
 }