Modified the behavior of "Hide Toolbar in Full Screen"

chrome/browser/prefs/browser_prefs.cc

 // Copyright 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/prefs/browser_prefs.h"
 
 #include <string>
 
 #include "base/metrics/histogram_macros.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 607 matching lines @@
 #if defined(OS_CHROMEOS) && defined(ENABLE_APP_LIST)
   // Added 02/2015.
   MigrateGoogleNowPrefs(profile);
 #endif
 
 #if defined(OS_WIN)
   // Added 11/2015.
   profile_prefs->ClearPref(kShownAutoLaunchInfobarDeprecated);
 #endif
 
+#if defined(OS_MACOSX)
+  // Migrate the value of kHideFullscreenToolbar to kShowFullscreenToolbar if
+  // it was set by the user. See crbug.com/590827.
+  // Added 03/2016.
+  const PrefService::Preference* hide_pref =
+      profile_prefs->FindPreference(prefs::kHideFullscreenToolbar);
+  if (!hide_pref->IsDefaultValue()) {
+    bool hide_pref_value =
+        profile_prefs->GetBoolean(prefs::kHideFullscreenToolbar);
+    profile_prefs->SetBoolean(prefs::kShowFullscreenToolbar, !hide_pref_value);
+    profile_prefs->ClearPref(prefs::kHideFullscreenToolbar);
+  }
+#endif
+
   // Added 12/1015.
   profile_prefs->ClearPref(kURLsToRestoreOnStartupOld);
   profile_prefs->ClearPref(kRestoreStartupURLsMigrationTime);
 
   // Added 12/2015.
   profile_prefs->ClearPref(kRestoreOnStartupMigrated);
 
 #if defined(USE_AURA)
   // Added 1/2016
   profile_prefs->ClearPref(kFlingMaxCancelToDownTimeInMs);
   profile_prefs->ClearPref(kFlingMaxTapGapTimeInMs);
   profile_prefs->ClearPref(kTabScrubActivationDelayInMs);
   profile_prefs->ClearPref(kMaxSeparationForGestureTouchesInPixels);
   profile_prefs->ClearPref(kSemiLongPressTimeInMs);
   profile_prefs->ClearPref(kOverscrollHorizontalThresholdComplete);
   profile_prefs->ClearPref(kOverscrollVerticalThresholdComplete);
   profile_prefs->ClearPref(kOverscrollMinimumThresholdStart);
   profile_prefs->ClearPref(kOverscrollMinimumThresholdStartTouchpad);
   profile_prefs->ClearPref(kOverscrollVerticalThresholdStart);
   profile_prefs->ClearPref(kOverscrollHorizontalResistThreshold);
   profile_prefs->ClearPref(kOverscrollVerticalResistThreshold);
 #endif  // defined(USE_AURA)
 }
 
 }  // namespace chrome