Move host resource from the proxy to the shared_impl.

ppapi/proxy/host_resource.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_HOST_RESOURCE_H_
-#define PPAPI_PROXY_HOST_RESOURCE_H_
-
-#include "ppapi/c/pp_instance.h"
-#include "ppapi/c/pp_resource.h"
-
-namespace pp {
-namespace proxy {
-
-// Represents a PP_Resource sent over the wire. This just wraps a PP_Resource.
-// The point is to prevent mistakes where the wrong resource value is sent.
-// Resource values are remapped in the plugin so that it can talk to multiple
-// hosts. If all values were PP_Resource, it would be easy to forget to do
-// this tranformation.
-//
-// All HostResources respresent IDs valid in the host.
-class HostResource {
- public:
-  HostResource() : instance_(0), host_resource_(0) {
-  }
-
-  bool is_null() const {
-    return !host_resource_;
-  }
-
-  // Some resources are plugin-side only and don't have a corresponding
-  // resource in the host. Yet these resources still need an instance to be
-  // associated with. This function creates a HostResource with the given
-  // instances and a 0 host resource ID for these cases.
-  static HostResource MakeInstanceOnly(PP_Instance instance) {
-    HostResource resource;
-    resource.SetHostResource(instance, 0);
-    return resource;
-  }
-
-  // Sets and retrieves the internal PP_Resource which is valid for the host
-  // (a.k.a. renderer, as opposed to the plugin) process.
-  //
-  // DO NOT CALL THESE FUNCTIONS IN THE PLUGIN SIDE OF THE PROXY. The values
-  // will be invalid. See the class comment above.
-  void SetHostResource(PP_Instance instance, PP_Resource resource) {
-    instance_ = instance;
-    host_resource_ = resource;
-  }
-  PP_Resource host_resource() const {
-    return host_resource_;
-  }
-
-  PP_Instance instance() const { return instance_; }
-
-  // This object is used in maps so we need to provide this sorting operator.
-  bool operator<(const HostResource& other) const {
-    if (instance_ != other.instance_)
-      return instance_ < other.instance_;
-    return host_resource_ < other.host_resource_;
-  }
-
- private:
-  PP_Instance instance_;
-  PP_Resource host_resource_;
-};
-
-}  // namespace proxy
-}  // namespace pp
-
-#endif  // PPAPI_PROXY_HOST_RESOURCE_H_