C++ bindings: separate out serialization source set, have "mojom" targets optionally use serializat…

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

 // Copyright 2013 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_CPP_BINDINGS_LIB_BINDINGS_SERIALIZATION_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_BINDINGS_SERIALIZATION_H_
 
 #include <vector>
 
-#include "mojo/public/cpp/bindings/interface_ptr.h"
 #include "mojo/public/cpp/bindings/lib/bindings_internal.h"
 #include "mojo/public/cpp/system/core.h"
 
 namespace mojo {
+
+template <typename I>
+class InterfacePtr;
+
+template <typename I>
+class InterfacePtrInfo;
+
 namespace internal {
 
 // Please note that this is a different value than |mojo::kInvalidHandleValue|,
 // which is the "decoded" invalid handle.
 const MojoHandle kEncodedInvalidHandleValue = static_cast<MojoHandle>(-1);
 
 size_t Align(size_t size);
 char* AlignPointer(char* ptr);
 
 bool IsAligned(const void* ptr);
@@ skipping 57 matching lines @@
 inline void InterfaceDataToPointer(Interface_Data* input,
                                    InterfacePtr<T>* output) {
   output->Bind(InterfacePtrInfo<T>(
       MakeScopedHandle(FetchAndReset(&input->handle)), input->version));
 }
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_BINDINGS_SERIALIZATION_H_