Ensure that PP_Instance values are unique within a plugin process in addition...

webkit/plugins/ppapi/plugin_module.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 "webkit/plugins/ppapi/plugin_module.h"
 
 #include <set>
 
 #include "base/command_line.h"
 #include "base/message_loop.h"
@@ skipping 364 matching lines @@
 }
 
 // PluginModule ----------------------------------------------------------------
 
 PluginModule::PluginModule(const std::string& name,
                            PluginDelegate::ModuleLifetime* lifetime_delegate)
     : lifetime_delegate_(lifetime_delegate),
       callback_tracker_(new CallbackTracker),
       is_crashed_(false),
       library_(NULL),
-      name_(name) {
+      name_(name),
+      reserve_instance_id_(NULL) {
   pp_module_ = ResourceTracker::Get()->AddModule(this);
   GetMainThreadMessageLoop();  // Initialize the main thread message loop.
   GetLivePluginSet()->insert(this);
 }
 
 PluginModule::~PluginModule() {
   // When the module is being deleted, there should be no more instances still
   // holding a reference to us.
   DCHECK(instances_.empty());
 
@@ skipping 102 matching lines @@
   is_crashed_ = true;
 
   // Notify all instances that they crashed.
   for (PluginInstanceSet::iterator i = instances_.begin();
        i != instances_.end(); ++i)
     (*i)->InstanceCrashed();
 
   lifetime_delegate_->PluginModuleDead(this);
 }
 
+void PluginModule::SetReserveInstanceIDCallback(
+    PP_Bool (*reserve)(PP_Module, PP_Instance)) {
+  DCHECK(!reserve_instance_id_) << "Only expect one set.";
+  reserve_instance_id_ = reserve;
+}
+
+bool PluginModule::ReserveInstanceID(PP_Instance instance) {
+  if (reserve_instance_id_)
+    return PPBoolToBool(reserve_instance_id_(pp_module_, instance));
+  return true;  // Instance ID is usable.
+}
+
 bool PluginModule::InitializeModule() {
   DCHECK(!out_of_process_proxy_.get()) << "Don't call for proxied modules.";
   int retval = entry_points_.initialize_module(pp_module(), &GetInterface);
   if (retval != 0) {
     LOG(WARNING) << "PPP_InitializeModule returned failure " << retval;
     return false;
   }
   return true;
 }
 
 }  // namespace ppapi
 }  // namespace webkit