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

mojo/public/c/include/mojo/bindings/internal/util.h

 // Copyright 2016 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.
 
-#ifndef MOJO_PUBLIC_C_BINDINGS_LIB_UTIL_H_
-#define MOJO_PUBLIC_C_BINDINGS_LIB_UTIL_H_
+#ifndef MOJO_PUBLIC_C_INCLUDE_MOJO_BINDINGS_INTERNAL_UTIL_H_
+#define MOJO_PUBLIC_C_INCLUDE_MOJO_BINDINGS_INTERNAL_UTIL_H_
 
 #include <mojo/macros.h>
+#include <stdint.h>
 
 // Rounds-up |num| to 8. The result is undefined if this results in an overflow.
 #define MOJOM_INTERNAL_ROUND_TO_8(num) (((num) + 7) & ~7)
 
 // Represents the memory layout of a mojom pointer; it is a |ptr| (pointer to
 // some memory) when unencoded, and refers to a relative |offset| when encoded.
 union MojomPointer {
   void* ptr;
   uint64_t offset;
 };
 MOJO_STATIC_ASSERT(sizeof(union MojomPointer) == 8,
                    "union MojomPointer must be 8 bytes");
 
 // This struct represents the state we need to keep when validating an encoded
 // mojom type.
 struct MojomValidationContext {
   // |next_handle_index| is a counter that represents the next-available index
   // into the handle array. Previous indices have already been used up. This
   // counter is non-decreasing as it is used throughout validation.
   uint32_t next_handle_index;
 
   // As we validate, we keep track of the point where pointers can point to,
   // since two pointers may not point to the same memory region.
   char* next_pointer;
 
   // TODO(vardhan): Include an error string? How big should it be?
 };
 
-#endif  // MOJO_PUBLIC_C_BINDINGS_LIB_UTIL_H_
+#endif  // MOJO_PUBLIC_C_INCLUDE_MOJO_BINDINGS_INTERNAL_UTIL_H_