working copy of "zero_copy"

content/common/gpu/client/gpu_channel_host.cc

Index: content/common/gpu/client/gpu_channel_host.cc
===================================================================
--- content/common/gpu/client/gpu_channel_host.cc	(revision 277402)
+++ content/common/gpu/client/gpu_channel_host.cc	(working copy)
@@ -53,6 +53,9 @@
 #if defined(OS_ANDROID)
     case gfx::SURFACE_TEXTURE_BUFFER:
 #endif
+#if defined(OS_LINUX)
+    case gfx::DMA_BUFFER:
+#endif
       return true;
     default:
       return false;
@@ -276,6 +279,7 @@
   return target_handle;
 #else
   int duped_handle = HANDLE_EINTR(dup(source_handle.fd));
+  //int duped_handle = source_handle.fd;
   if (duped_handle < 0)
     return base::SharedMemory::NULLHandle();
 
@@ -290,10 +294,16 @@
 gfx::GpuMemoryBufferHandle GpuChannelHost::ShareGpuMemoryBufferToGpuProcess(
     gfx::GpuMemoryBufferHandle source_handle) {
   switch (source_handle.type) {
+#if defined(OS_LINUX)
+    case gfx::DMA_BUFFER:
+#endif
     case gfx::SHARED_MEMORY_BUFFER: {
       gfx::GpuMemoryBufferHandle handle;
-      handle.type = gfx::SHARED_MEMORY_BUFFER;
+      handle.type = source_handle.type;
       handle.handle = ShareToGpuProcess(source_handle.handle);
+      //fprintf(stderr, "(%d -> %d)\n", source_handle.handle.fd, handle.handle.fd);
+      handle.card_handle = ShareToGpuProcess(source_handle.card_handle);
+      handle.stride = source_handle.stride;
       return handle;
     }
 #if defined(OS_MACOSX)