Remove all the swap() stuff in the PPAPI C++ wrappers....

ppapi/cpp/dev/directory_reader_dev.cc

 // Copyright (c) 2010 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 "ppapi/cpp/dev/directory_reader_dev.h"
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/dev/directory_entry_dev.h"
 #include "ppapi/cpp/dev/file_ref_dev.h"
@@ skipping 15 matching lines @@
   PassRefFromConstructor(
       directory_reader_f->Create(directory_ref.pp_resource()));
 }
 
 DirectoryReader_Dev::DirectoryReader_Dev(const DirectoryReader_Dev& other)
     : Resource(other) {
 }
 
 DirectoryReader_Dev& DirectoryReader_Dev::operator=(
     const DirectoryReader_Dev& other) {
-  DirectoryReader_Dev copy(other);
-  swap(copy);
+  Resource::operator=(other);
   return *this;
 }
 
-void DirectoryReader_Dev::swap(DirectoryReader_Dev& other) {
-  Resource::swap(other);
-}
-
 int32_t DirectoryReader_Dev::GetNextEntry(DirectoryEntry_Dev* entry,
                                           const CompletionCallback& cc) {
   if (!directory_reader_f)
     return PP_ERROR_NOINTERFACE;
   return directory_reader_f->GetNextEntry(pp_resource(), &entry->data_,
                                           cc.pp_completion_callback());
 }
 
 }  // namespace pp