Track NPObject ownership by the originating plugins' NPP identifier. [4/6] (Chrome)

content/plugin/plugin_channel.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 "content/plugin/plugin_channel.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/process_util.h"
 #include "base/strings/string_util.h"
 #include "base/synchronization/lock.h"
 #include "base/synchronization/waitable_event.h"
 #include "build/build_config.h"
 #include "content/child/child_process.h"
 #include "content/child/plugin_messages.h"
 #include "content/common/plugin_process_messages.h"
 #include "content/plugin/plugin_thread.h"
 #include "content/plugin/webplugin_delegate_stub.h"
 #include "content/plugin/webplugin_proxy.h"
 #include "content/public/common/content_switches.h"
+#include "third_party/WebKit/public/web/WebBindings.h"
 #include "webkit/plugins/npapi/plugin_instance.h"
 
 #if defined(OS_POSIX)
 #include "base/posix/eintr_wrapper.h"
 #include "ipc/ipc_channel_posix.h"
 #endif
 
+using WebKit::WebBindings;
+
 namespace content {
 
 namespace {
 
 void PluginReleaseCallback() {
   ChildProcess::current()->ReleaseProcess();
 }
 
 // How long we wait before releasing the plugin process.
 const int kPluginReleaseTimeMinutes = 5;
@@ skipping 192 matching lines @@
     return false;
 
   channel_->AddFilter(filter_.get());
   return true;
 }
 
 PluginChannel::PluginChannel()
     : renderer_id_(-1),
       in_send_(0),
       incognito_(false),
-      filter_(new MessageFilter()) {
+      filter_(new MessageFilter()),
+      npp_(new struct _NPP) {
   set_send_unblocking_only_during_unblock_dispatch();
   ChildProcess::current()->AddRefProcess();
   const CommandLine* command_line = CommandLine::ForCurrentProcess();
   log_messages_ = command_line->HasSwitch(switches::kLogPluginMessages);
+
+  // Register |npp_| as the default owner for any object we receive via IPC,
+  // and register it with WebBindings as a valid owner.
+  AddDefaultNPObjectOwner(npp_.get());
+  WebBindings::registerObjectOwner(npp_.get());
 }
 
 bool PluginChannel::OnControlMessageReceived(const IPC::Message& msg) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PluginChannel, msg)
     IPC_MESSAGE_HANDLER(PluginMsg_CreateInstance, OnCreateInstance)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(PluginMsg_DestroyInstance,
                                     OnDestroyInstance)
     IPC_MESSAGE_HANDLER(PluginMsg_GenerateRouteID, OnGenerateRouteID)
     IPC_MESSAGE_HANDLER(PluginProcessMsg_ClearSiteData, OnClearSiteData)
@@ skipping 60 matching lines @@
                        : base::StringPrintf("\"%s\"", site_str);
       VLOG(1) << "NPP_ClearSiteData(" << site_name << ", " << flags << ", "
               << max_age << ") returned " << err;
       success = (err == NPERR_NO_ERROR);
     }
   }
   Send(new PluginProcessHostMsg_ClearSiteDataResult(success));
 }
 
 }  // namespace content