gpu: Add IOSurface backed GpuMemoryBuffer implementation.

content/common/gpu/client/gpu_memory_buffer_impl_mac.cc

Index: content/common/gpu/client/gpu_memory_buffer_impl_mac.cc
diff --git a/content/common/gpu/client/gpu_memory_buffer_impl_mac.cc b/content/common/gpu/client/gpu_memory_buffer_impl_mac.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1c8e5521a01e678e32b4c84d3cb69be2689604bb
--- /dev/null
+++ b/content/common/gpu/client/gpu_memory_buffer_impl_mac.cc
@@ -0,0 +1,38 @@
+// Copyright 2013 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_memory_buffer_impl.h"
+
+#include "content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h"
+#include "content/common/gpu/client/gpu_memory_buffer_impl_shm.h"
+
+namespace content {
+
+scoped_ptr<GpuMemoryBufferImpl> GpuMemoryBufferImpl::Create(
+    gfx::GpuMemoryBufferHandle handle,
+    gfx::Size size,
+    unsigned internalformat) {
+  switch (handle.type) {
+    case gfx::SHARED_MEMORY_BUFFER: {
+      scoped_ptr<GpuMemoryBufferImplShm> buffer(
+          new GpuMemoryBufferImplShm(size, internalformat));
+      if (!buffer->Initialize(handle))
+        return scoped_ptr<GpuMemoryBufferImpl>();
+
+      return buffer.PassAs<GpuMemoryBufferImpl>();
+    }
+    case gfx::IO_SURFACE_BUFFER: {
+      scoped_ptr<GpuMemoryBufferImplIOSurface> buffer(
+          new GpuMemoryBufferImplIOSurface(size, internalformat));
+      if (!buffer->Initialize(handle))
+        return scoped_ptr<GpuMemoryBufferImpl>();
+
+      return buffer.PassAs<GpuMemoryBufferImpl>();
+    }
+    default:
+      return scoped_ptr<GpuMemoryBufferImpl>();
+  }
+}
+
+}  // namespace content