Modified the behavior of "Hide Toolbar in Full Screen"

chrome/browser/prefs/browser_prefs.cc

Index: chrome/browser/prefs/browser_prefs.cc
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index 1b37e180b490b5d860bac2c399ce8429379d2112..ccac7341b5440a93686db583e9382d1d6e3e17c4 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -625,6 +625,20 @@ void MigrateObsoleteProfilePrefs(Profile* profile) {
   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 2/2016.

[msw, 2016/03/01 23:44:19]

nit: 03/2016; it's march already :)

+  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);