Add custom default theme support and create a managed user default theme.

chrome/browser/themes/theme_service_factory.cc

Index: chrome/browser/themes/theme_service_factory.cc
diff --git a/chrome/browser/themes/theme_service_factory.cc b/chrome/browser/themes/theme_service_factory.cc
index 92fe85cdd03146c9da63d1c0e66d54c213a424fe..58dbb9673bc18e56a2733c93e9741589f599da06 100644
--- a/chrome/browser/themes/theme_service_factory.cc
+++ b/chrome/browser/themes/theme_service_factory.cc
@@ -23,6 +23,11 @@
 #include "ui/linux_ui/linux_ui.h"
 #endif
 
+#if defined(ENABLE_MANAGED_USERS)
+#include "chrome/browser/managed_mode/managed_user_service.h"
+#include "chrome/browser/managed_mode/managed_user_theme.h"
+#endif
+
 // static
 ThemeService* ThemeServiceFactory::GetForProfile(Profile* profile) {
   return static_cast<ThemeService*>(
@@ -63,6 +68,13 @@ BrowserContextKeyedService* ThemeServiceFactory::BuildServiceInstanceFor(
 #endif
   provider->Init(static_cast<Profile*>(profile));
 
+#if defined(ENABLE_MANAGED_USERS)
+  if (ManagedUserService::ProfileIsManaged(static_cast<Profile*>(profile)) &&
+      provider->UsingDefaultTheme()) {
+    provider->SetCustomDefaultTheme(new ManagedUserTheme);
+  }
+#endif
+
   return provider;
 }