EDK: Move ref counting classes to mojo/edk/util.

mojo/edk/embedder/embedder.cc

Index: mojo/edk/embedder/embedder.cc
diff --git a/mojo/edk/embedder/embedder.cc b/mojo/edk/embedder/embedder.cc
index 204fd206865cd7f85e79fda7822894b7ebd2907c..9e1e4627b351527cc15188470d6f74d9b4939e0b 100644
--- a/mojo/edk/embedder/embedder.cc
+++ b/mojo/edk/embedder/embedder.cc
@@ -25,7 +25,9 @@
 #include "mojo/edk/system/message_pipe_dispatcher.h"
 #include "mojo/edk/system/platform_handle_dispatcher.h"
 #include "mojo/edk/system/raw_channel.h"
-#include "mojo/edk/system/ref_ptr.h"
+#include "mojo/edk/util/ref_ptr.h"
+
+using mojo::util::RefPtr;
 
 namespace mojo {
 namespace embedder {
@@ -184,7 +186,7 @@ ScopedMessagePipeHandle ConnectToSlave(
       internal::g_ipc_support->GenerateConnectionIdentifier();
   *platform_connection_id = connection_id.ToString();
   system::ChannelId channel_id = system::kInvalidChannelId;
-  system::RefPtr<system::MessagePipeDispatcher> dispatcher =
+  RefPtr<system::MessagePipeDispatcher> dispatcher =
       internal::g_ipc_support->ConnectToSlave(
           connection_id, slave_info, platform_handle.Pass(),
           did_connect_to_slave_callback, std::move(did_connect_to_slave_runner),
@@ -211,7 +213,7 @@ ScopedMessagePipeHandle ConnectToMaster(
   CHECK(ok);
 
   system::ChannelId channel_id = system::kInvalidChannelId;
-  system::RefPtr<system::MessagePipeDispatcher> dispatcher =
+  RefPtr<system::MessagePipeDispatcher> dispatcher =
       internal::g_ipc_support->ConnectToMaster(
           connection_id, did_connect_to_master_callback,
           std::move(did_connect_to_master_runner), &channel_id);
@@ -235,7 +237,7 @@ ScopedMessagePipeHandle CreateChannelOnIOThread(
       internal::g_ipc_support->channel_manager();
 
   *channel_info = new ChannelInfo(MakeChannelId());
-  system::RefPtr<system::MessagePipeDispatcher> dispatcher =
+  RefPtr<system::MessagePipeDispatcher> dispatcher =
       channel_manager->CreateChannelOnIOThread((*channel_info)->channel_id,
                                                platform_handle.Pass());
 
@@ -258,7 +260,7 @@ ScopedMessagePipeHandle CreateChannel(
 
   system::ChannelId channel_id = MakeChannelId();
   std::unique_ptr<ChannelInfo> channel_info(new ChannelInfo(channel_id));
-  system::RefPtr<system::MessagePipeDispatcher> dispatcher =
+  RefPtr<system::MessagePipeDispatcher> dispatcher =
       channel_manager->CreateChannel(
           channel_id, platform_handle.Pass(),
           base::Bind(did_create_channel_callback,