Introduce a layering in the invalidation component as public and impl

components/invalidation/impl/push_client_channel_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 <string>
 
 #include "base/compiler_specific.h"
-#include "components/invalidation/push_client_channel.h"
+#include "components/invalidation/impl/push_client_channel.h"
 #include "jingle/notifier/listener/fake_push_client.h"
 #include "jingle/notifier/listener/notification_defines.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace syncer {
 namespace {
 
 class PushClientChannelTest
     : public ::testing::Test,
       public SyncNetworkChannel::Observer {
@@ skipping 224 matching lines @@
         &service_context,
         &scheduling_hash));
     EXPECT_EQ(kMessage, message);
     EXPECT_EQ(kServiceContext, service_context);
     EXPECT_EQ(kSchedulingHash, scheduling_hash);
   }
 }
 
 }  // namespace
 }  // namespace syncer