PPAPI: Implement operator= for FileChooser_Trusted.

ppapi/cpp/trusted/file_chooser_trusted.cc

 // Copyright (c) 2011 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/trusted/file_chooser_trusted.h"
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/cpp/module_impl.h"
@@ skipping 22 matching lines @@
       save_as_(save_as),
       suggested_file_name_(suggested_file_name) {
 }
 
 FileChooser_Trusted::FileChooser_Trusted(const FileChooser_Trusted& other)
     : FileChooser_Dev(other),
       save_as_(other.save_as_),
       suggested_file_name_(other.suggested_file_name_) {
 }
 
+FileChooser_Trusted& FileChooser_Trusted::operator=(
+    const FileChooser_Trusted& other) {
+  FileChooser_Dev::operator=(other);
+  save_as_ = other.save_as_;
+  suggested_file_name_ = other.suggested_file_name_;
+  return *this;
+}
+
 int32_t FileChooser_Trusted::Show(const CompletionCallback& cc) {
   if (!has_interface<PPB_FileChooserTrusted>())
     return cc.MayForce(PP_ERROR_NOINTERFACE);
   return get_interface<PPB_FileChooserTrusted>()->ShowWithoutUserGesture(
       pp_resource(),
       PP_FromBool(save_as_),
       Var(suggested_file_name_).pp_var(),
       cc.pp_completion_callback());
 }
 
 }  // namespace pp