Add a sandbox API for broker handle duplication

content/plugin/plugin_channel.cc

Index: content/plugin/plugin_channel.cc
===================================================================
--- content/plugin/plugin_channel.cc	(revision 128951)
+++ content/plugin/plugin_channel.cc	(working copy)
@@ -161,8 +161,7 @@
 }
 
 PluginChannel::PluginChannel()
-    : renderer_handle_(0),
-      renderer_id_(-1),
+    : renderer_id_(-1),
       in_send_(0),
       incognito_(false),
       filter_(new MessageFilter()) {
@@ -173,9 +172,6 @@
 }
 
 PluginChannel::~PluginChannel() {
-  if (renderer_handle_)
-    base::CloseProcessHandle(renderer_handle_);
-
   MessageLoop::current()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&PluginReleaseCallback),
@@ -292,18 +288,7 @@
   return filter_->GetModalDialogEvent(containing_window);
 }
 
-void PluginChannel::OnChannelConnected(int32 peer_pid) {
-  base::ProcessHandle handle;
-  if (!base::OpenProcessHandle(peer_pid, &handle)) {
-    NOTREACHED();
-  }
-  renderer_handle_ = handle;
-  NPChannelBase::OnChannelConnected(peer_pid);
-}
-
 void PluginChannel::OnChannelError() {
-  base::CloseProcessHandle(renderer_handle_);
-  renderer_handle_ = 0;
   NPChannelBase::OnChannelError();
   CleanUp();
 }