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

ppapi/cpp/dev/buffer_dev.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/dev/buffer_dev.h"
 
 #include "ppapi/c/dev/ppb_buffer_dev.h"
-#include "ppapi/cpp/instance.h"
+#include "ppapi/cpp/instance_handle.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/module_impl.h"
 
 namespace pp {
 
 namespace {
 
 template <> const char* interface_name<PPB_Buffer_Dev>() {
   return PPB_BUFFER_DEV_INTERFACE;
 }
 
 }  // namespace
 
 Buffer_Dev::Buffer_Dev() : data_(NULL), size_(0) {
 }
 
 Buffer_Dev::Buffer_Dev(const Buffer_Dev& other)
     : Resource(other) {
   Init();
 }
 
 Buffer_Dev::Buffer_Dev(PP_Resource resource)
     : Resource(resource) {
   Init();
 }
 
-Buffer_Dev::Buffer_Dev(Instance* instance, uint32_t size)
+Buffer_Dev::Buffer_Dev(const InstanceHandle& instance, uint32_t size)
     : data_(NULL),
       size_(0) {
   if (!has_interface<PPB_Buffer_Dev>())
     return;
 
   PassRefFromConstructor(get_interface<PPB_Buffer_Dev>()->Create(
-      instance->pp_instance(), size));
+      instance.pp_instance(), size));
   Init();
 }
 
 Buffer_Dev::~Buffer_Dev() {
   get_interface<PPB_Buffer_Dev>()->Unmap(pp_resource());
 }
 
 Buffer_Dev& Buffer_Dev::operator=(const Buffer_Dev& rhs) {
   Resource::operator=(rhs);
   Init();
   return *this;
 }
 
 void Buffer_Dev::Init() {
   if (!get_interface<PPB_Buffer_Dev>()->Describe(pp_resource(), &size_) ||
       !(data_ = get_interface<PPB_Buffer_Dev>()->Map(pp_resource()))) {
     data_ = NULL;
     size_ = 0;
   }
 }
 
 }  // namespace pp