dbus: add ObjectPath type

chrome/browser/chromeos/dbus/bluetooth_adapter_client.h

Index: chrome/browser/chromeos/dbus/bluetooth_adapter_client.h
diff --git a/chrome/browser/chromeos/dbus/bluetooth_adapter_client.h b/chrome/browser/chromeos/dbus/bluetooth_adapter_client.h
index e7401007e942e7e8b88df59462099f4c581c3fc0..2e7e0f0ccab1d3673e912fdc626d061586f88131 100644
--- a/chrome/browser/chromeos/dbus/bluetooth_adapter_client.h
+++ b/chrome/browser/chromeos/dbus/bluetooth_adapter_client.h
@@ -11,6 +11,7 @@
 #include "base/callback.h"
 #include "base/observer_list.h"
 #include "base/values.h"
+#include "dbus/object_path.h"
 
 namespace dbus {
 class Bus;
@@ -30,25 +31,25 @@ class BluetoothAdapterClient {
     virtual ~Observer() {}
 
     // Called when a new known device has been created.
-    virtual void DeviceCreated(const std::string& object_path,
-                               const std::string& device_path) {}
+    virtual void DeviceCreated(const dbus::ObjectPath& object_path,
+                               const dbus::ObjectPath& device_path) {}
 
     // Called when a previously known device is removed.
-    virtual void DeviceRemoved(const std::string& object_path,
-                               const std::string& device_path) {}
+    virtual void DeviceRemoved(const dbus::ObjectPath& object_path,
+                               const dbus::ObjectPath& device_path) {}
 
     // Called when the adapter's Discovering property changes.
-    virtual void DiscoveringPropertyChanged(const std::string& object_path,
+    virtual void DiscoveringPropertyChanged(const dbus::ObjectPath& object_path,
                                             bool discovering) {}
 
     // Called when a new remote device has been discovered.
     // |device_properties| should be copied if needed.
-    virtual void DeviceFound(const std::string& object_path,
+    virtual void DeviceFound(const dbus::ObjectPath& object_path,
                              const std::string& address,
                              const DictionaryValue& device_properties) {}
 
     // Called when a previously discovered device is no longer visible.
-    virtual void DeviceDisappeared(const std::string& object_path,
+    virtual void DeviceDisappeared(const dbus::ObjectPath& object_path,
                                    const std::string& address) {}
   };
 
@@ -60,11 +61,11 @@ class BluetoothAdapterClient {
   virtual void RemoveObserver(Observer* observer) = 0;
 
   // Starts a device discovery on the adapter with object path |object_path|.
-  virtual void StartDiscovery(const std::string& object_path) = 0;
+  virtual void StartDiscovery(const dbus::ObjectPath& object_path) = 0;
 
   // Cancels any previous device discovery on the adapter with object path
   // |object_path|.
-  virtual void StopDiscovery(const std::string& object_path) = 0;
+  virtual void StopDiscovery(const dbus::ObjectPath& object_path) = 0;
 
   // Creates the instance.
   static BluetoothAdapterClient* Create(dbus::Bus* bus,