Revert 132218 - Convert plugin and GPU process to brokered handle duplication.

content/browser/renderer_host/gpu_message_filter.cc

Index: content/browser/renderer_host/gpu_message_filter.cc
===================================================================
--- content/browser/renderer_host/gpu_message_filter.cc	(revision 132251)
+++ content/browser/renderer_host/gpu_message_filter.cc	(working copy)
@@ -173,11 +173,31 @@
 void GpuMessageFilter::EstablishChannelCallback(
     IPC::Message* reply,
     const IPC::ChannelHandle& channel,
+    base::ProcessHandle gpu_process_for_browser,
     const content::GPUInfo& gpu_info) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
+  base::ProcessHandle renderer_process_for_gpu;
+  if (gpu_process_for_browser != 0) {
+#if defined(OS_WIN)
+    // Create a process handle that the renderer process can give to the GPU
+    // process to give it access to its handles.
+    DuplicateHandle(base::GetCurrentProcessHandle(),
+                    peer_handle(),
+                    gpu_process_for_browser,
+                    &renderer_process_for_gpu,
+                    PROCESS_DUP_HANDLE,
+                    FALSE,
+                    0);
+#else
+    renderer_process_for_gpu = peer_handle();
+#endif
+  } else {
+    renderer_process_for_gpu = 0;
+  }
+
   GpuHostMsg_EstablishGpuChannel::WriteReplyParams(
-      reply, render_process_id_, channel, gpu_info);
+      reply, render_process_id_, channel, renderer_process_for_gpu, gpu_info);
   Send(reply);
 }