Change the canonical way to include the C bindings headers to <mojo/bindings/*.h>.

mojo/public/c/include/mojo/bindings/union.h

Index: mojo/public/c/include/mojo/bindings/union.h
diff --git a/mojo/public/c/bindings/union.h b/mojo/public/c/include/mojo/bindings/union.h
similarity index 94%
rename from mojo/public/c/bindings/union.h
rename to mojo/public/c/include/mojo/bindings/union.h
index 066f773cbaa18004867eacab61937bbf4686730d..345f7b450e80af7ec3370737c79555109d9d89ba 100644
--- a/mojo/public/c/bindings/union.h
+++ b/mojo/public/c/include/mojo/bindings/union.h
@@ -2,17 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef MOJO_PUBLIC_C_BINDINGS_UNION_H_
-#define MOJO_PUBLIC_C_BINDINGS_UNION_H_
+#ifndef MOJO_PUBLIC_C_INCLUDE_MOJO_BINDINGS_UNION_H_
+#define MOJO_PUBLIC_C_INCLUDE_MOJO_BINDINGS_UNION_H_
 
+#include <mojo/bindings/buffer.h>
+#include <mojo/bindings/internal/type_descriptor.h>
+#include <mojo/bindings/internal/util.h>
 #include <mojo/macros.h>
 #include <stddef.h>
 #include <stdint.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"
-
 MOJO_BEGIN_EXTERN_C
 
 struct MojomUnionLayout {
@@ -116,4 +115,4 @@ bool MojomUnion_DeepCopy(struct MojomBuffer* buffer,
 
 MOJO_END_EXTERN_C
 
-#endif  // MOJO_PUBLIC_C_BINDINGS_UNION_H_
+#endif  // MOJO_PUBLIC_C_INCLUDE_MOJO_BINDINGS_UNION_H_