bluetooth: Check if Object Manager is supported before initializing clients on linux

Two big changes:

1. On Linux, we check if Object Manager is supported before we try to initialize
   the DBus clients. This solves the log spamming issue. On Chrome OS we initialize
   the clients regardless of Object Manager support (we've always done this);
   we keep the current behavior because by the time BluezDBusManager is
   initialized Bluez is not ready and it appears as if Bluetooth is not supported

2. BluetoothAdapterBluez::CreateAdapter now takes a callback which runs after
   we know whether Object Manager is supported or not and BluetoothAdapter is
   initialized. Because of this change we fix all tests and users that assumed
   BluetoothAdapterFactory::CreateAdapter was synchronous.

Design doc: https://docs.google.com/a/chromium.org/document/d/1xmMV7RsnEM6bejH-fYejAdE7q4BkucutuVFP7WI7mgY/edit?usp=sharing
BUG=583637

Review URL: https://codereview.chromium.org/1679983002

Cr-Commit-Position: refs/heads/master@{#377772}

1 files changed, 3 insertions, 3 deletions

diff --git a/device/bluetooth/dbus/bluetooth_dbus_client_bundle.h b/device/bluetooth/dbus/bluetooth_dbus_client_bundle.h
index 3beef61..2cd102e 100644
--- a/device/bluetooth/dbus/bluetooth_dbus_client_bundle.h
+++ b/device/bluetooth/dbus/bluetooth_dbus_client_bundle.h
@@ -31,11 +31,11 @@ class BluetoothProfileManagerClient;
 // system bus. See also the comment in the destructor of DBusThreadManager.
 class DEVICE_BLUETOOTH_EXPORT BluetoothDBusClientBundle {
  public:
-  explicit BluetoothDBusClientBundle(bool use_stubs);
+  explicit BluetoothDBusClientBundle(bool use_fakes);
   ~BluetoothDBusClientBundle();
 
   // Returns true if |client| is stubbed.
-  bool IsUsingStub() { return use_stubs_; }
+  bool IsUsingFakes() { return use_fakes_; }
 
   BluetoothAdapterClient* bluetooth_adapter_client() {
     return bluetooth_adapter_client_.get();
@@ -89,7 +89,7 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothDBusClientBundle {
  private:
   friend class BluezDBusManagerSetter;
 
-  bool use_stubs_;
+  bool use_fakes_;
 
   scoped_ptr<BluetoothAdapterClient> bluetooth_adapter_client_;
   scoped_ptr<BluetoothLEAdvertisingManagerClient>