Move MessageWriter from snapshot files to dart_api_message files

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart.h"
 #include "vm/dart_api_impl.h"
+#include "vm/dart_api_message.h"
 #include "vm/dart_api_state.h"
 #include "vm/dart_entry.h"
 #include "vm/debuginfo.h"
 #include "vm/exceptions.h"
 #include "vm/growable_array.h"
 #include "vm/message.h"
 #include "vm/native_entry.h"
 #include "vm/native_message_handler.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/port.h"
 #include "vm/resolver.h"
-#include "vm/snapshot.h"
 #include "vm/stack_frame.h"
 #include "vm/timer.h"
 #include "vm/verifier.h"
 
 namespace dart {
 
 ThreadLocalKey Api::api_native_key_ = Thread::kUnsetThreadLocalKey;
 
 const char* CanonicalFunction(const char* func) {
   if (strncmp(func, "dart::", 6) == 0) {
@@ skipping 647 matching lines @@
 static uint8_t* allocator(uint8_t* ptr, intptr_t old_size, intptr_t new_size) {
   void* new_ptr = realloc(reinterpret_cast<void*>(ptr), new_size);
   return reinterpret_cast<uint8_t*>(new_ptr);
 }
 
 
 DART_EXPORT bool Dart_PostIntArray(Dart_Port port_id,
                                    intptr_t len,
                                    intptr_t* data) {
   uint8_t* buffer = NULL;
-  MessageWriter writer(&buffer, &allocator);
+  ApiMessageWriter writer(&buffer, &allocator);
 
   writer.WriteMessage(len, data);
 
   // Post the message at the given port.
   return PortMap::PostMessage(new Message(
       port_id, Message::kIllegalPort, buffer, Message::kNormalPriority));
 }
 
 
 DART_EXPORT bool Dart_PostCObject(Dart_Port port_id, Dart_CObject* message) {
   uint8_t* buffer = NULL;
-  MessageWriter writer(&buffer, allocator);
+  ApiMessageWriter writer(&buffer, allocator);
 
   writer.WriteCMessage(message);
 
   // Post the message at the given port.
   return PortMap::PostMessage(new Message(
       port_id, Message::kIllegalPort, buffer, Message::kNormalPriority));
 }
 
 
 DART_EXPORT bool Dart_Post(Dart_Port port_id, Dart_Handle handle) {
@@ skipping 1801 matching lines @@
       *buffer = NULL;
     }
     delete debug_region;
   } else {
     *buffer = NULL;
     *buffer_size = 0;
   }
 }
 
 }  // namespace dart