C bindings: Implement _Validate(), and some pre-requisites

mojo/public/c/bindings/map.h

Index: mojo/public/c/bindings/map.h
diff --git a/mojo/public/c/bindings/map.h b/mojo/public/c/bindings/map.h
index ec4d58315e80ad25f0e322cb9b8fa36cd5b3a2aa..6b08094d0a96be5c290f3a3e7771e4891af3273d 100644
--- a/mojo/public/c/bindings/map.h
+++ b/mojo/public/c/bindings/map.h
@@ -8,8 +8,10 @@
 #include <stdint.h>
 
 #include "mojo/public/c/bindings/array.h"
-#include "mojo/public/c/bindings/buffer.h"
+#include "mojo/public/c/bindings/lib/type_descriptor.h"
+#include "mojo/public/c/bindings/lib/util.h"
 #include "mojo/public/c/bindings/struct.h"
+#include "mojo/public/c/system/handle.h"
 #include "mojo/public/c/system/macros.h"
 
 MOJO_BEGIN_EXTERN_C
@@ -32,6 +34,13 @@ union MojomMapHeaderPtr {
 MOJO_STATIC_ASSERT(sizeof(union MojomMapHeaderPtr) == 8,
                    "MojomMapHeaderPtr must be 8 bytes.");
 
+MojomValidationResult MojomMap_Validate(
+    const struct MojomTypeDescriptorStruct* in_type_desc,
+    const struct MojomStructHeader* in_struct,
+    uint32_t in_buf_size,
+    uint32_t in_num_handles,
+    struct MojomValidationContext* inout_context);
+
 MOJO_END_EXTERN_C
 
 #endif  // MOJO_PUBLIC_C_BINDINGS_MAP_H_