Convert plugin and GPU process to brokered handle duplication.

content/common/gpu/media/dxva_video_decode_accelerator.cc

Index: content/common/gpu/media/dxva_video_decode_accelerator.cc
===================================================================
--- content/common/gpu/media/dxva_video_decode_accelerator.cc	(revision 132263)
+++ content/common/gpu/media/dxva_video_decode_accelerator.cc	(working copy)
@@ -142,20 +142,9 @@
 
 static IMFSample* CreateSampleFromInputBuffer(
     const media::BitstreamBuffer& bitstream_buffer,
-    base::ProcessHandle renderer_process,
     DWORD stream_size,
     DWORD alignment) {
-  HANDLE shared_memory_handle = NULL;
-  RETURN_ON_FAILURE(::DuplicateHandle(renderer_process,
-                                      bitstream_buffer.handle(),
-                                      base::GetCurrentProcessHandle(),
-                                      &shared_memory_handle,
-                                      0,
-                                      FALSE,
-                                      DUPLICATE_SAME_ACCESS),
-                     "Duplicate handle failed", NULL);
-
-  base::SharedMemory shm(shared_memory_handle, true);
+  base::SharedMemory shm(bitstream_buffer.handle(), true);
   RETURN_ON_FAILURE(shm.Map(bitstream_buffer.size()),
                     "Failed in base::SharedMemory::Map", NULL);
 
@@ -505,13 +494,11 @@
 }
 
 DXVAVideoDecodeAccelerator::DXVAVideoDecodeAccelerator(
-    media::VideoDecodeAccelerator::Client* client,
-    base::ProcessHandle renderer_process)
+    media::VideoDecodeAccelerator::Client* client)
     : client_(client),
       egl_config_(NULL),
       state_(kUninitialized),
       pictures_requested_(false),
-      renderer_process_(renderer_process),
       last_input_buffer_id_(-1),
       inputs_before_decode_(0) {
   memset(&input_stream_info_, 0, sizeof(input_stream_info_));
@@ -560,7 +547,6 @@
 
   base::win::ScopedComPtr<IMFSample> sample;
   sample.Attach(CreateSampleFromInputBuffer(bitstream_buffer,
-                                            renderer_process_,
                                             input_stream_info_.cbSize,
                                             input_stream_info_.cbAlignment));
   RETURN_AND_NOTIFY_ON_FAILURE(sample, "Failed to create input sample",