Mojo C++ bindings: more consistent Clone() and Equals().

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

Index: mojo/public/cpp/bindings/lib/array_internal.h
diff --git a/mojo/public/cpp/bindings/lib/array_internal.h b/mojo/public/cpp/bindings/lib/array_internal.h
index 00ae00b70114f7ecb1acc2aa96c8e6b73db962ac..e0f92626377403ac8a865f8af08f67809b6192a2 100644
--- a/mojo/public/cpp/bindings/lib/array_internal.h
+++ b/mojo/public/cpp/bindings/lib/array_internal.h
@@ -16,11 +16,11 @@
 #include "mojo/public/cpp/bindings/lib/bindings_internal.h"
 #include "mojo/public/cpp/bindings/lib/bounds_checker.h"
 #include "mojo/public/cpp/bindings/lib/buffer.h"
-#include "mojo/public/cpp/bindings/lib/map_data_internal.h"
 #include "mojo/public/cpp/bindings/lib/serialization_util.h"
 #include "mojo/public/cpp/bindings/lib/template_util.h"
 #include "mojo/public/cpp/bindings/lib/validate_params.h"
 #include "mojo/public/cpp/bindings/lib/validation_errors.h"
+#include "mojo/public/cpp/bindings/lib/validation_util.h"
 
 namespace mojo {
 namespace internal {
@@ -29,6 +29,9 @@ namespace internal {
 // C++11).
 const uint32_t kMaxUint32 = 0xFFFFFFFF;
 
+template <typename K, typename V>
+class Map_Data;
+
 std::string MakeMessageWithArrayIndex(const char* message,
                                       size_t size,
                                       size_t index);