Add GpuMemoryBuffer support for DXGI handles.

ui/gfx/mojo/buffer_types_struct_traits.h

Index: ui/gfx/mojo/buffer_types_struct_traits.h
diff --git a/ui/gfx/mojo/buffer_types_struct_traits.h b/ui/gfx/mojo/buffer_types_struct_traits.h
index ad25a17c8ae6ff539d5d58a82815ea1f61c5e1ba..6aecf7539bb5e901264397652515b82f42f0e2a0 100644
--- a/ui/gfx/mojo/buffer_types_struct_traits.h
+++ b/ui/gfx/mojo/buffer_types_struct_traits.h
@@ -167,6 +167,8 @@ struct EnumTraits<gfx::mojom::GpuMemoryBufferType, gfx::GpuMemoryBufferType> {
         return gfx::mojom::GpuMemoryBufferType::IO_SURFACE_BUFFER;
       case gfx::GpuMemoryBufferType::NATIVE_PIXMAP:
         return gfx::mojom::GpuMemoryBufferType::NATIVE_PIXMAP;
+      case gfx::GpuMemoryBufferType::DXGI_HANDLE:
+        return gfx::mojom::GpuMemoryBufferType::DXGI_HANDLE;

[dcheng, 2017/07/12 08:46:19]

Should non-Windows platforms NOTREACHED() this case?

[reveman, 2017/07/12 15:04:14]

Then similar NOTREACHED() for other buffer types too to be consistent. As is is
fine with me.

     }
     NOTREACHED();
     return gfx::mojom::GpuMemoryBufferType::LAST;
@@ -187,6 +189,9 @@ struct EnumTraits<gfx::mojom::GpuMemoryBufferType, gfx::GpuMemoryBufferType> {
       case gfx::mojom::GpuMemoryBufferType::NATIVE_PIXMAP:
         *out = gfx::GpuMemoryBufferType::NATIVE_PIXMAP;
         return true;
+      case gfx::mojom::GpuMemoryBufferType::DXGI_HANDLE:
+        *out = gfx::GpuMemoryBufferType::DXGI_HANDLE;

[dcheng, 2017/07/12 08:46:19]

Though this can't be notreached, since this received over ipc

+        return true;
     }
     return false;
   }
@@ -271,6 +276,8 @@ struct StructTraits<gfx::mojom::GpuMemoryBufferHandleDataView,
   }
   static mojo::ScopedSharedBufferHandle shared_memory_handle(
       const gfx::GpuMemoryBufferHandle& handle);
+  static mojo::ScopedHandle win32_handle(
+      const gfx::GpuMemoryBufferHandle& handle);
   static uint32_t offset(const gfx::GpuMemoryBufferHandle& handle) {
     return handle.offset;
   }
@@ -280,6 +287,13 @@ struct StructTraits<gfx::mojom::GpuMemoryBufferHandleDataView,
   static const gfx::NativePixmapHandle& native_pixmap_handle(
       const gfx::GpuMemoryBufferHandle& handle);
   static mojo::ScopedHandle mach_port(const gfx::GpuMemoryBufferHandle& handle);
+  static uint32_t array_level(const gfx::GpuMemoryBufferHandle& handle) {
+#if defined(OS_WIN)
+    return handle.array_level;
+#else
+    return 0;
+#endif
+  }
   static bool Read(gfx::mojom::GpuMemoryBufferHandleDataView data,
                    gfx::GpuMemoryBufferHandle* handle);
 };