Mojo: Use new message APIs to reduce copying

mojo/public/cpp/bindings/BUILD.gn

 # 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.
 
 source_set("bindings") {
   sources = [
     "array.h",
     "array_traits.h",
     "associated_binding.h",
     "associated_group.h",
@@ skipping 32 matching lines @@
     "lib/fixed_buffer.h",
     "lib/interface_endpoint_client.cc",
     "lib/interface_endpoint_client.h",
     "lib/interface_endpoint_controller.h",
     "lib/interface_id.h",
     "lib/interface_ptr_state.h",
     "lib/map_data_internal.h",
     "lib/map_internal.h",
     "lib/map_serialization.h",
     "lib/message.cc",
+    "lib/message_buffer.cc",
+    "lib/message_buffer.h",
     "lib/message_builder.cc",
     "lib/message_builder.h",
     "lib/message_filter.cc",
     "lib/message_header_validator.cc",
     "lib/message_header_validator.h",
     "lib/message_internal.h",
     "lib/multiplex_router.cc",
     "lib/multiplex_router.h",
     "lib/native_struct.cc",
     "lib/native_struct_data.cc",
     "lib/native_struct_data.h",
     "lib/native_struct_serialization.cc",
     "lib/native_struct_serialization.h",
     "lib/no_interface.cc",
-    "lib/pickle_buffer.cc",
-    "lib/pickle_buffer.h",
     "lib/pipe_control_message_handler.cc",
     "lib/pipe_control_message_handler.h",
     "lib/pipe_control_message_handler_delegate.h",
     "lib/pipe_control_message_proxy.cc",
     "lib/pipe_control_message_proxy.h",
     "lib/router.cc",
     "lib/router.h",
     "lib/scoped_interface_endpoint_handle.cc",
     "lib/scoped_interface_endpoint_handle.h",
     "lib/serialization.h",
@@ skipping 72 matching lines @@
     "wtf_array.h",
   ]
 
   public_deps = [
     ":bindings",
     "//third_party/WebKit/Source/wtf",
   ]
 
   public_configs = [ "//third_party/WebKit/Source:config" ]
 }