Mojo: Move system embedder API files to mojo/system/embedder.

mojo/system/embedder/embedder_unittest.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/system/embedder.h"
+#include "mojo/system/embedder/embedder.h"
 
 #include <string.h>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 // TODO(vtl): Remove build_config.h include when fully implemented on Windows.
 #include "build/build_config.h"
 #include "mojo/public/system/core.h"
-#include "mojo/system/platform_channel_pair.h"
-#include "mojo/system/test_embedder.h"
+#include "mojo/system/embedder/platform_channel_pair.h"
+#include "mojo/system/embedder/test_embedder.h"
 #include "mojo/system/test_utils.h"
 
 namespace mojo {
 namespace embedder {
 namespace {
 
 typedef system::test::TestWithIOThreadBase EmbedderTest;
 
 void StoreChannelInfo(ChannelInfo** store_channel_info_here,
                       ChannelInfo* channel_info) {
@@ skipping 66 matching lines @@
 
   test::Shutdown();
 }
 
 // TODO(vtl): Test immediate write & close.
 // TODO(vtl): Test broken-connection cases.
 
 }  // namespace
 }  // namespace embedder
 }  // namespace mojo