gpu: Add IOSurface backed GpuMemoryBuffer implementation.

content/common/gpu/client/gpu_channel_host.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 "content/common/gpu/client/gpu_channel_host.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
@@ skipping 33 matching lines @@
       factory, gpu_host_id, client_id, gpu_info);
   host->Connect(channel_handle);
   return host;
 }
 
 // static
 bool GpuChannelHost::IsValidGpuMemoryBuffer(
     gfx::GpuMemoryBufferHandle handle) {
   switch (handle.type) {
     case gfx::SHARED_MEMORY_BUFFER:
+#if defined(OS_MACOSX)
+    case gfx::IO_SURFACE_BUFFER:
+#endif
       return true;
     default:
       return false;
   }
 }
 
 GpuChannelHost::GpuChannelHost(GpuChannelHostFactory* factory,
                                int gpu_host_id,
                                int client_id,
                                const gpu::GPUInfo& gpu_info)
@@ skipping 235 matching lines @@
 
 gfx::GpuMemoryBufferHandle GpuChannelHost::ShareGpuMemoryBufferToGpuProcess(
     gfx::GpuMemoryBufferHandle source_handle) {
   switch (source_handle.type) {
     case gfx::SHARED_MEMORY_BUFFER: {
       gfx::GpuMemoryBufferHandle handle;
       handle.type = gfx::SHARED_MEMORY_BUFFER;
       handle.handle = ShareToGpuProcess(source_handle.handle);
       return handle;
     }
+#if defined(OS_MACOSX)
+    case gfx::IO_SURFACE_BUFFER:
+      return source_handle;
+#endif
     default:
       NOTREACHED();
       return gfx::GpuMemoryBufferHandle();
   }
 }
 
 int32 GpuChannelHost::ReserveGpuMemoryBufferId() {
   return next_gpu_memory_buffer_id_.GetNext();
 }
 
@@ skipping 120 matching lines @@
   AutoLock lock(lock_);
   DCHECK_LE(names.size(), requested_mailboxes_);
   requested_mailboxes_ -= names.size();
   mailbox_name_pool_.insert(mailbox_name_pool_.end(),
                             names.begin(),
                             names.end());
 }
 
 
 }  // namespace content