[mojo] Add Mojo bindings support for IPC::ParamTraits

mojo/public/cpp/bindings/lib/fixed_buffer.cc

 // Copyright 2014 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.
 
 #include "mojo/public/cpp/bindings/lib/fixed_buffer.h"
 
 #include <stdlib.h>
 
 #include <algorithm>
 
 #include "mojo/public/cpp/bindings/lib/bindings_serialization.h"
 #include "mojo/public/cpp/environment/logging.h"
 
 namespace mojo {
 namespace internal {
 
 FixedBuffer::FixedBuffer() : ptr_(nullptr), cursor_(0), size_(0) {}
 
 void FixedBuffer::Initialize(void* memory, size_t size) {
   MOJO_DCHECK(size == internal::Align(size));
 
   ptr_ = static_cast<char*>(memory);
   cursor_ = 0;
   size_ = size;
 }
 
+PickleBuffer* FixedBuffer::AsPickleBuffer() { return nullptr; }
+
 void* FixedBuffer::Allocate(size_t delta) {
   delta = internal::Align(delta);
 
   if (delta == 0 || delta > size_ - cursor_) {
     MOJO_DCHECK(false) << "Not reached";
     return nullptr;
   }
 
   char* result = ptr_ + cursor_;
   cursor_ += delta;
@@ skipping 14 matching lines @@
 void* FixedBufferForTesting::Leak() {
   char* ptr = ptr_;
   ptr_ = nullptr;
   cursor_ = 0;
   size_ = 0;
   return ptr;
 }
 
 }  // namespace internal
 }  // namespace mojo