Use an explicit PID for duplicating Pepper handles rather than the Channel's.

chrome/renderer/pepper/ppb_nacl_private_impl.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 "chrome/renderer/pepper/ppb_nacl_private_impl.h"
 
 #ifndef DISABLE_NACL
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 24 matching lines @@
 
 namespace {
 
 // This allows us to send requests from background threads.
 // E.g., to do LaunchSelLdr for helper nexes (which is done synchronously),
 // in a background thread, to avoid jank.
 base::LazyInstance<scoped_refptr<IPC::SyncMessageFilter> >
     g_background_thread_sender = LAZY_INSTANCE_INITIALIZER;
 
 struct InstanceInfo {
-  InstanceInfo() : plugin_child_id(0) {}
+  InstanceInfo() : plugin_pid(base::kNullProcessId), plugin_child_id(0) {}
   GURL url;
   ppapi::PpapiPermissions permissions;
+  base::ProcessId plugin_pid;
   int plugin_child_id;
   IPC::ChannelHandle channel_handle;
 };
 
 typedef std::map<PP_Instance, InstanceInfo> InstanceInfoMap;
 
 base::LazyInstance<InstanceInfoMap> g_instance_info =
     LAZY_INSTANCE_INITIALIZER;
 
 static int GetRoutingID(PP_Instance instance) {
@@ skipping 40 matching lines @@
     perm_bits |= ppapi::PERMISSION_DEV;
   instance_info.permissions =
       ppapi::PpapiPermissions::GetForCommandLine(perm_bits);
 
   if (!sender->Send(new ChromeViewHostMsg_LaunchNaCl(
           instance_info.url,
           routing_id,
           perm_bits,
           socket_count, &sockets,
           &instance_info.channel_handle,
+          &instance_info.plugin_pid,
           &instance_info.plugin_child_id))) {
     return PP_NACL_FAILED;
   }
 
   // Don't save instance_info if channel handle is invalid.
   bool invalid_handle = instance_info.channel_handle.name.empty();
 #if defined(OS_POSIX)
   if (!invalid_handle)
     invalid_handle = (instance_info.channel_handle.socket.fd == -1);
 #endif
@@ skipping 34 matching lines @@
   scoped_refptr<webkit::ppapi::PluginModule> nacl_plugin_module(
       plugin_module->CreateModuleForNaClInstance());
 
   content::RendererPpapiHost* renderer_ppapi_host =
       content::RendererPpapiHost::CreateExternalPluginModule(
           nacl_plugin_module,
           plugin_instance,
           FilePath().AppendASCII(instance_info.url.spec()),
           instance_info.permissions,
           instance_info.channel_handle,
+          instance_info.plugin_pid,
           instance_info.plugin_child_id);
   if (!renderer_ppapi_host)
     return PP_NACL_ERROR_MODULE;
 
   // Finally, switch the instance to the proxy.
   return nacl_plugin_module->InitAsProxiedNaCl(plugin_instance);
 }
 
 int UrandomFD(void) {
 #if defined(OS_POSIX)
@@ skipping 106 matching lines @@
   &ReportNaClError
 };
 
 }  // namespace
 
 const PPB_NaCl_Private* PPB_NaCl_Private_Impl::GetInterface() {
   return &nacl_interface;
 }
 
 #endif  // DISABLE_NACL