Convert resources to take an instance key instead of an Instance*.

ppapi/cpp/trusted/file_chooser_trusted.cc

 // Copyright (c) 2012 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"
 #include "ppapi/cpp/var.h"
 #include "ppapi/c/trusted/ppb_file_chooser_trusted.h"
 
 namespace pp {
 
 namespace {
 
 template <> const char* interface_name<PPB_FileChooserTrusted>() {
   return PPB_FILECHOOSER_TRUSTED_INTERFACE;
 }
 
 }  // namespace
 
 FileChooser_Trusted::FileChooser_Trusted() : save_as_(false) {
 }
 
-FileChooser_Trusted::FileChooser_Trusted(const Instance* instance,
+FileChooser_Trusted::FileChooser_Trusted(const InstanceHandle& instance,
                                          PP_FileChooserMode_Dev mode,
                                          const Var& accept_mime_types,
                                          bool save_as,
                                          const std::string& suggested_file_name)
     : FileChooser_Dev(instance, mode, accept_mime_types),
       save_as_(save_as),
       suggested_file_name_(suggested_file_name) {
 }
 
 FileChooser_Trusted::FileChooser_Trusted(const FileChooser_Trusted& other)
@@ skipping 14 matching lines @@
   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