Remove all the ephemeral apps code.

chrome/browser/background/background_mode_manager_unittest.cc

Index: chrome/browser/background/background_mode_manager_unittest.cc
diff --git a/chrome/browser/background/background_mode_manager_unittest.cc b/chrome/browser/background/background_mode_manager_unittest.cc
index 633680b4ca2b68f92394d995184db27a61f5b840..757fc1c63db8c34ff494e536dffef241f43d793b 100644
--- a/chrome/browser/background/background_mode_manager_unittest.cc
+++ b/chrome/browser/background/background_mode_manager_unittest.cc
@@ -310,20 +310,6 @@ class BackgroundModeManagerWithExtensionsTest : public testing::Test {
     return false;
   }
 
-  void AddEphemeralApp(const extensions::Extension* extension,
-                       ExtensionService* service) {
-    extensions::ExtensionPrefs* prefs =
-        extensions::ExtensionPrefs::Get(service->profile());
-    ASSERT_TRUE(prefs);
-    prefs->OnExtensionInstalled(extension,
-                                extensions::Extension::ENABLED,
-                                syncer::StringOrdinal(),
-                                extensions::kInstallFlagIsEphemeral,
-                                std::string());
-
-    service->AddExtension(extension);
-  }
-
   scoped_ptr<TestBackgroundModeManager> manager_;
 
   scoped_ptr<base::CommandLine> command_line_;