Add support for not compiling in chrome/browser/background.

chrome/browser/profiles/profile_dependency_manager.cc

Index: chrome/browser/profiles/profile_dependency_manager.cc
diff --git a/chrome/browser/profiles/profile_dependency_manager.cc b/chrome/browser/profiles/profile_dependency_manager.cc
index 97579174fdd39a02e0443bac40658b1add95c9ec..3565e0cd70472216155c72d4279a332c435712ac 100644
--- a/chrome/browser/profiles/profile_dependency_manager.cc
+++ b/chrome/browser/profiles/profile_dependency_manager.cc
@@ -166,7 +166,6 @@ void ProfileDependencyManager::AssertFactoriesBuilt() {
   if (built_factories_)
     return;
 
-  BackgroundContentsServiceFactory::GetInstance();
   CookieSettings::Factory::GetInstance();
   DownloadServiceFactory::GetInstance();
   FindBarStateFactory::GetInstance();
@@ -206,6 +205,9 @@ void ProfileDependencyManager::AssertFactoriesBuilt() {
 #if defined(ENABLE_WEB_INTENTS)
   WebIntentsRegistryFactory::GetInstance();
 #endif
+#if defined(ENABLE_BACKGROUND)
+  BackgroundContentsServiceFactory::GetInstance();
+#endif  // defined(ENABLE_BACKGROUND)
 
   built_factories_ = true;
 }