Move more Mojo bindings helpers out of internal namespace

mojo/public/cpp/bindings/message_header_validator.h

Index: mojo/public/cpp/bindings/message_header_validator.h
diff --git a/mojo/public/cpp/bindings/lib/message_header_validator.h b/mojo/public/cpp/bindings/message_header_validator.h
similarity index 76%
rename from mojo/public/cpp/bindings/lib/message_header_validator.h
rename to mojo/public/cpp/bindings/message_header_validator.h
index 6e56b7f0ad92217dd9333f9c519f4516c1ccc3ac..3bcbd0a9563c2f9c9ad94d7f4fa2ea739bcb82cb 100644
--- a/mojo/public/cpp/bindings/lib/message_header_validator.h
+++ b/mojo/public/cpp/bindings/message_header_validator.h
@@ -2,14 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_HEADER_VALIDATOR_H_
-#define MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_HEADER_VALIDATOR_H_
+#ifndef MOJO_PUBLIC_CPP_BINDINGS_MESSAGE_HEADER_VALIDATOR_H_
+#define MOJO_PUBLIC_CPP_BINDINGS_MESSAGE_HEADER_VALIDATOR_H_
 
 #include "mojo/public/cpp/bindings/message.h"
 #include "mojo/public/cpp/bindings/message_filter.h"
 
 namespace mojo {
-namespace internal {
 
 class MessageHeaderValidator : public MessageFilter {
  public:
@@ -27,7 +26,6 @@ class MessageHeaderValidator : public MessageFilter {
   std::string description_;
 };
 
-}  // namespace internal
 }  // namespace mojo
 
-#endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_HEADER_VALIDATOR_H_
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_MESSAGE_HEADER_VALIDATOR_H_