Use base::BindOnce for PostTask callbacks.

TaskRunner::PostTask() takes a OnceCallback. Replace usage of
base::Bind(), which produces a RepeatingCallback, with base::BindOnce()
when the callback is created as a temporary inside of PostTask(). The
following regex was used to find instances that could be replaced:

(Post(?:Delayed)?Task)\((?:\n\s*)?FROM_HERE,(?:\n)?\s*base::Bind\(

Also replace any usage of base::Passed(&var) with std::move(var) for
variables passed to base::BindOnce(). base::Passed() isn't needed for
move-only types with OnceCallbacks.

This CL was uploaded by git cl split.

R=stevenjb@chromium.org

Bug: 714018
Change-Id: I70dce39d3975123cf0709f1787cc68f49ba9a57d
Reviewed-on: https://chromium-review.googlesource.com/c/1475733
Auto-Submit: kylechar <kylechar@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#633334}

diff --git a/dbus/object_manager.cc b/dbus/object_manager.cc
index 9bca1c0e..05d4b2d 100644
--- a/dbus/object_manager.cc
+++ b/dbus/object_manager.cc

@@ -308,10 +308,8 @@
     // |signal| to NotifyPropertiesChanged, which will handle the clean up.
     Signal* released_signal = signal.release();
     bus_->GetOriginTaskRunner()->PostTask(
-        FROM_HERE,
-        base::Bind(&ObjectManager::NotifyPropertiesChanged,
-                   this, path,
-                   released_signal));
+        FROM_HERE, base::BindOnce(&ObjectManager::NotifyPropertiesChanged, this,
+                                  path, released_signal));
   } else {
     // If the D-Bus thread is not used, just call the callback on the
     // current thread. Transfer the ownership of |signal| to
@@ -334,8 +332,7 @@
 
   // Delete the message on the D-Bus thread. See comments in HandleMessage.
   bus_->GetDBusTaskRunner()->PostTask(
-      FROM_HERE,
-      base::Bind(&base::DeletePointer<Signal>, signal));
+      FROM_HERE, base::BindOnce(&base::DeletePointer<Signal>, signal));
 }
 
 void ObjectManager::NotifyPropertiesChangedHelper(