Convert remaining scoped_ptr -> std::unique_ptr in //mojo/edk (minus js).

mojo/edk/system/raw_channel_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/edk/system/raw_channel.h"
 
 #include <stdint.h>
 #include <stdio.h>
 
 #include <memory>
@@ skipping 809 matching lines @@
     platform_handles->push_back(
         mojo::test::PlatformHandleFromFILE(fp1.Pass()).release());
     platform_handles->push_back(
         mojo::test::PlatformHandleFromFILE(fp2.Pass()).release());
 
     std::unique_ptr<MessageInTransit> message(
         new MessageInTransit(MessageInTransit::Type::ENDPOINT_CLIENT,
                              MessageInTransit::Subtype::ENDPOINT_CLIENT_DATA,
                              sizeof(kHello), kHello));
     message->SetTransportData(util::MakeUnique<TransportData>(
-        platform_handles.Pass(), rc_write->GetSerializedPlatformHandleSize()));
+        std::move(platform_handles),
+        rc_write->GetSerializedPlatformHandleSize()));
     EXPECT_TRUE(rc_write->WriteMessage(std::move(message)));
   }
 
   read_delegate.Wait();
 
   io_thread()->PostTaskAndWait(
       FROM_HERE,
       base::Bind(&RawChannel::Shutdown, base::Unretained(rc_read.get())));
   io_thread()->PostTaskAndWait(
       FROM_HERE,
       base::Bind(&RawChannel::Shutdown, base::Unretained(rc_write.get())));
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo