D-Bus: ObjectProxy remove function for Bus object.

dbus/bus.h

Index: dbus/bus.h
diff --git a/dbus/bus.h b/dbus/bus.h
index 75de9a3d1e240d51b81ba208ff910df2a5df3942..7d00756529cbc19dbecdf9cf3bc756c326fd0bd1 100644
--- a/dbus/bus.h
+++ b/dbus/bus.h
@@ -202,6 +202,14 @@ class CHROME_DBUS_EXPORT Bus : public base::RefCountedThreadSafe<Bus> {
   // - whether ownership has been obtained or not.
   typedef base::Callback<void (const std::string&, bool)> OnOwnershipCallback;
 
+  // Called when an object proxy removal is complete.
+  // Parameters identify the removed object proxy:
+  // - the service name.
+  // - the object path.
+  // - options
+  typedef base::Callback<void (const std::string&, const ObjectPath&, int)>
+      OnRemoveObjectProxyCallback;
+
   // Gets the object proxy for the given service name and the object path.
   // The caller must not delete the returned object.
   //
@@ -230,6 +238,42 @@ class CHROME_DBUS_EXPORT Bus : public base::RefCountedThreadSafe<Bus> {
       const ObjectPath& object_path,
       int options);
 
+  // Removes the previously created object proxy for the given service
+  // name and the object path and releases its memory.
+  //
+  // If and object proxy for the given service name and object was
+  // created with GetObjectProxy, this function removes it from the
+  // bus object and detaches the ObjectProxy, invalidating any pointer
+  // previously acquired for it with GetObjectProxy. A subsequent call
+  // to GetObjectProxy will return a new object.
+  //
+  // All the object proxies are detached from remote objects at the
+  // shutdown time of the bus, but they can be detached early to reduce
+  // memory footprint and used match rules for the bus connection.
+  //
+  // |service_name| looks like "org.freedesktop.NetworkManager", and
+  // |object_path| looks like "/org/freedesktop/NetworkManager/Devices/0".
+  // |callback| is called when the object proxy is successfully removed and
+  // detached.
+  //
+  // The function returns true when there is an object proxy matching the
+  // |service_name| and |object_path| to remove, and calls |callback| when it
+  // is removed. Otherwise, it returns false and the |callback| function is
+  // never called.
+  //
+  // Must be called in the origin thread.
+  virtual bool RemoveObjectProxy(const std::string& service_name,
+                                 const ObjectPath& object_path,
+                                 OnRemoveObjectProxyCallback callback);
+
+  // Same as above, but also takes a bitfield of ObjectProxy::Options.
+  // See object_proxy.h for available options.
+  virtual bool RemoveObjectProxyWithOptions(
+      const std::string& service_name,
+      const ObjectPath& object_path,
+      int options,
+      OnRemoveObjectProxyCallback callback);
+
   // Gets the exported object for the given object path.
   // The caller must not delete the returned object.
   //
@@ -449,6 +493,19 @@ class CHROME_DBUS_EXPORT Bus : public base::RefCountedThreadSafe<Bus> {
  private:
   friend class base::RefCountedThreadSafe<Bus>;
 
+  // Helper function used for RemoveObjectProxy().
+  void RemoveObjectProxyInternal(scoped_refptr<dbus::ObjectProxy> object_proxy,
+                                 const std::string& service_name,
+                                 const dbus::ObjectPath& object_path,
+                                 int options,
+                                 OnRemoveObjectProxyCallback callback);
+
+  // Called when the object proxy removal is completed.
+  void OnRemoveObjectProxy(OnRemoveObjectProxyCallback callback,
+                           const std::string& service_name,
+                           const dbus::ObjectPath& object_path,
+                           int options);
+
   // Helper function used for UnregisterExportedObject().
   void UnregisterExportedObjectInternal(
       scoped_refptr<dbus::ExportedObject> exported_object);