Clean up async app launcher enabled checks.

apps/app_launcher.cc

Index: apps/app_launcher.cc
diff --git a/apps/app_launcher.cc b/apps/app_launcher.cc
index 77a75fc858e85be68a55ac581d3e457f2ce636b2..0493c65aa4d8d30c530520fcd3531c31caf35b19 100644
--- a/apps/app_launcher.cc
+++ b/apps/app_launcher.cc
@@ -5,13 +5,10 @@
 #include "apps/app_launcher.h"
 
 #include "apps/pref_names.h"
-#include "base/command_line.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
-#include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/ui/host_desktop.h"
-#include "content/public/browser/browser_thread.h"
 
 #if defined(OS_WIN)
 #include "chrome/installer/launcher_support/chrome_launcher_support.h"
@@ -20,54 +17,22 @@
 
 namespace apps {
 
-namespace {
-
-enum AppLauncherState {
-  APP_LAUNCHER_UNKNOWN,
-  APP_LAUNCHER_ENABLED,
-  APP_LAUNCHER_DISABLED,
-};
-
-AppLauncherState SynchronousAppLauncherChecks() {
+bool IsAppLauncherEnabled() {
 #if defined(USE_ASH) && !defined(OS_WIN)
-  return APP_LAUNCHER_ENABLED;
+  return true;
 #elif !defined(OS_WIN)
-  return APP_LAUNCHER_DISABLED;
+  return false;
 #else
 #if defined(USE_ASH)
   if (chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_ASH)
-    return APP_LAUNCHER_ENABLED;
+    return true;
 #endif
   PrefService* prefs = g_browser_process->local_state();
   // In some tests, the prefs aren't initialised.
   if (!prefs)
-    return APP_LAUNCHER_UNKNOWN;
-  return prefs->GetBoolean(prefs::kAppLauncherHasBeenEnabled) ?
-      APP_LAUNCHER_ENABLED : APP_LAUNCHER_DISABLED;
+    return false;
+  return prefs->GetBoolean(prefs::kAppLauncherHasBeenEnabled);
 #endif
 }
 
-}  // namespace
-
-bool MaybeIsAppLauncherEnabled() {
-  return SynchronousAppLauncherChecks() == APP_LAUNCHER_ENABLED;
-}
-
-void GetIsAppLauncherEnabled(
-    const OnAppLauncherEnabledCompleted& completion_callback) {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
-
-  AppLauncherState state = SynchronousAppLauncherChecks();
-
-  if (state != APP_LAUNCHER_UNKNOWN) {
-    completion_callback.Run(state == APP_LAUNCHER_ENABLED);
-    return;
-  }
-  NOTREACHED();
-}
-
-bool WasAppLauncherEnabled() {
-  return SynchronousAppLauncherChecks() == APP_LAUNCHER_ENABLED;
-}
-
 }  // namespace apps