Revert 87415 - Convert more interfaces to the new thunk system. This goes up to and including

ppapi/proxy/enter_proxy.h

-// 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.
-
-#ifndef PPAPI_PROXY_ENTER_PROXY_H_
-#define PPAPI_PROXY_ENTER_PROXY_H_
-
-#include "base/logging.h"
-#include "ppapi/proxy/host_dispatcher.h"
-#include "ppapi/proxy/plugin_dispatcher.h"
-#include "ppapi/proxy/plugin_resource_tracker.h"
-#include "ppapi/thunk/enter.h"
-
-namespace pp {
-namespace proxy {
-
-// Wrapper around EnterResourceNoLock that takes a host resource. This is used
-// when handling messages in the plugin from the host and we need to convert to
-// an object in the plugin side corresponding to that.
-//
-// This never locks since we assume the host Resource is coming from IPC, and
-// never logs errors since we assume the host is doing reasonable things.
-template<typename ResourceT>
-class EnterPluginFromHostResource
-    : public ::ppapi::thunk::EnterResourceNoLock<ResourceT> {
- public:
-  EnterPluginFromHostResource(const HostResource& host_resource)
-      : ::ppapi::thunk::EnterResourceNoLock<ResourceT>(
-            PluginResourceTracker::GetInstance()->PluginResourceForHostResource(
-                host_resource),
-            false) {
-    // Validate that we're in the plugin rather than the host. Otherwise this
-    // object will do the wrong thing. In the plugin, the instance should have
-    // a corresponding plugin dispatcher (assuming the resource is valid).
-    DCHECK(this->failed() ||
-           PluginDispatcher::GetForInstance(host_resource.instance()));
-  }
-};
-
-template<typename ResourceT>
-class EnterHostFromHostResource
-    : public ::ppapi::thunk::EnterResourceNoLock<ResourceT> {
- public:
-  EnterHostFromHostResource(const HostResource& host_resource)
-      : ::ppapi::thunk::EnterResourceNoLock<ResourceT>(
-            host_resource.host_resource(), false) {
-    // Validate that we're in the host rather than the plugin. Otherwise this
-    // object will do the wrong thing. In the host, the instance should have
-    // a corresponding host disptacher (assuming the resource is valid).
-    DCHECK(this->failed() ||
-           HostDispatcher::GetForInstance(host_resource.instance()));
-  }
-};
-
-}  // namespace proxy
-}  // namespace pp
-
-#endif  // PPAPI_PROXY_ENTER_PROXY_H_