Turn //mojo/public/cpp/bindings and //mojo/public/cpp/system into components

mojo/public/cpp/bindings/lib/validation_context.h

Index: mojo/public/cpp/bindings/lib/validation_context.h
diff --git a/mojo/public/cpp/bindings/lib/validation_context.h b/mojo/public/cpp/bindings/lib/validation_context.h
index 1a49cd11d2d3fc0ef91eb14e87401537015420ba..f8fe58ea22f330b5c017f58dff5ab7acb02a487b 100644
--- a/mojo/public/cpp/bindings/lib/validation_context.h
+++ b/mojo/public/cpp/bindings/lib/validation_context.h
@@ -11,6 +11,7 @@
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/strings/string_piece.h"
+#include "mojo/public/cpp/bindings/bindings_export.h"
 #include "mojo/public/cpp/bindings/lib/bindings_internal.h"
 
 static const int kMaxRecursionDepth = 100;
@@ -23,7 +24,7 @@ namespace internal {
 
 // ValidationContext is used when validating object sizes, pointers and handle
 // indices in the payload of incoming messages.
-class ValidationContext {
+class MOJO_CPP_BINDINGS_EXPORT ValidationContext {
  public:
   // [data, data + data_num_bytes) specifies the initial valid memory range.
   // [0, num_handles) specifies the initial valid range of handle indices.