[PPAPI] Added a new Var subclass, ResourceVar.

ppapi/shared_impl/var.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/shared_impl/var.h"
 
 #include <limits>
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 73 matching lines @@
 }
 
 ArrayVar* Var::AsArrayVar() {
   return NULL;
 }
 
 DictionaryVar* Var::AsDictionaryVar() {
   return NULL;
 }
 
+ResourceVar* Var::AsResourceVar() {
+  return NULL;
+}
+
 PP_Var Var::GetPPVar() {
   int32 id = GetOrCreateVarID();
   if (!id)
     return PP_MakeNull();
 
   PP_Var result;
   result.type = GetType();
   result.padding = 0;
   result.value.as_id = id;
   return result;
@@ skipping 96 matching lines @@
 ArrayBufferVar* ArrayBufferVar::FromPPVar(PP_Var var) {
   if (var.type != PP_VARTYPE_ARRAY_BUFFER)
     return NULL;
   scoped_refptr<Var> var_object(
       PpapiGlobals::Get()->GetVarTracker()->GetVar(var));
   if (!var_object.get())
     return NULL;
   return var_object->AsArrayBufferVar();
 }
 
+// ResourceVar -----------------------------------------------------------------
+
+ResourceInfo::ResourceInfo()
+    : pending_renderer_id(0),
+      resource_id(0),
+      file_system_type(PP_FILESYSTEMTYPE_INVALID) {
+}
+
+ResourceVar::ResourceVar() {}
+
+ResourceVar::~ResourceVar() {}
+
+void ResourceVar::SetPendingId(int pending_renderer_id) {
+  data_.pending_renderer_id = pending_renderer_id;
+}
+
+void ResourceVar::SetResourceId(int resource_id) {
+  data_.resource_id = resource_id;
+}
+
+void ResourceVar::SetFileSystemType(PP_FileSystemType file_system_type) {
+  data_.file_system_type = file_system_type;
+}
+
+ResourceVar* ResourceVar::AsResourceVar() {
+  return this;
+}
+
+PP_VarType ResourceVar::GetType() const {
+  // TODO(mgiuca): Return PP_VARTYPE_RESOURCE, once that is a valid enum value.
+  NOTREACHED();
+  return PP_VARTYPE_UNDEFINED;
+}
+
+// static
+ResourceVar* ResourceVar::FromPPVar(PP_Var var) {
+  // TODO(mgiuca): Implement this function, once PP_VARTYPE_RESOURCE is
+  // introduced.
+  return NULL;
+}
+
 }  // namespace ppapi