cros: Init SystemTrayDelegate earlier to break bluetooth init dependency

chrome/browser/ui/ash/system_tray_delegate_chromeos.cc

Index: chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc b/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
index c74b5c960fd665f6038c197466e1c4a7d521cbe6..31ec08e679c77d92ceb02bd97f173183c373348b 100644
--- a/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
@@ -124,7 +124,7 @@ bool IsSessionInSecondaryLoginScreen() {
 }  // namespace
 
 SystemTrayDelegateChromeOS::SystemTrayDelegateChromeOS()
-    : bluetooth_helper_(base::MakeUnique<TrayBluetoothHelper>(this)),
+    : bluetooth_helper_(base::MakeUnique<TrayBluetoothHelper>()),
       networking_config_delegate_(
           base::MakeUnique<NetworkingConfigDelegateChromeos>()) {
   // Register notifications on construction so that events such as
@@ -162,9 +162,7 @@ void SystemTrayDelegateChromeOS::Initialize() {
   bluetooth_helper_->Initialize();
 
   BrowserList::AddObserver(this);
-}
 
-void SystemTrayDelegateChromeOS::InitializeOnAdapterReady() {
   local_state_registrar_.reset(new PrefChangeRegistrar);
   local_state_registrar_->Init(g_browser_process->local_state());