Fix first time switching from classic to GTK theme.

chrome/browser/themes/theme_service_aurax11.cc

Index: chrome/browser/themes/theme_service_aurax11.cc
diff --git a/chrome/browser/themes/theme_service_aurax11.cc b/chrome/browser/themes/theme_service_aurax11.cc
index 95a834ca24efa1bab2418da2ea3a305d7d34df11..8eb13ed8847f98ba52dd63ab98670acfdb0958b2 100644
--- a/chrome/browser/themes/theme_service_aurax11.cc
+++ b/chrome/browser/themes/theme_service_aurax11.cc
@@ -43,13 +43,16 @@ SystemThemeX11::SystemThemeX11(PrefService* pref_service)
 
 void SystemThemeX11::StartUsingTheme() {
   pref_service_->SetBoolean(prefs::kUsesSystemTheme, true);
-  // Have the former theme notify its observers of change.
+  // Both old and new themes' observers should be notified of the change.

[Elliot Glaysher, 2014/06/13 20:05:54]

Could you please expand this comment to include more information that you put in
the commit message? This is hack, and should have a bigger explanation.

[Evan Stade, 2014/06/13 20:14:39]

Done.

+  if (linux_ui_)
+    linux_ui_->GetNativeTheme(NULL)->NotifyObservers();
   ui::NativeThemeAura::instance()->NotifyObservers();
 }
 
 void SystemThemeX11::StopUsingTheme() {
   pref_service_->SetBoolean(prefs::kUsesSystemTheme, false);
-  // Have the former theme notify its observers of change.
+  // Both old and new themes' observers should be notified of the change.
+  ui::NativeThemeAura::instance()->NotifyObservers();
   if (linux_ui_)
     linux_ui_->GetNativeTheme(NULL)->NotifyObservers();
 }