Add //mojo/edk/platform and move platform_task_runners.h there.

mojo/edk/test/scoped_ipc_support.h

 // Copyright 2015 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.
 
 #ifndef MOJO_EDK_TEST_SCOPED_IPC_SUPPORT_H_
 #define MOJO_EDK_TEST_SCOPED_IPC_SUPPORT_H_
 
 #include "base/callback.h"
 #include "mojo/edk/embedder/master_process_delegate.h"
-#include "mojo/edk/embedder/platform_task_runner.h"
 #include "mojo/edk/embedder/process_delegate.h"
 #include "mojo/edk/embedder/process_type.h"
 #include "mojo/edk/embedder/scoped_platform_handle.h"
 #include "mojo/edk/embedder/slave_process_delegate.h"
+#include "mojo/edk/platform/task_runner.h"
 #include "mojo/edk/util/ref_ptr.h"
 #include "mojo/edk/util/waitable_event.h"
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
 namespace test {
 
 namespace internal {
 
 class ScopedIPCSupportHelper final {
  public:
   ScopedIPCSupportHelper();
   ~ScopedIPCSupportHelper();
 
   void Init(embedder::ProcessType process_type,
             embedder::ProcessDelegate* process_delegate,
-            util::RefPtr<embedder::PlatformTaskRunner>&& io_thread_task_runner,
+            util::RefPtr<platform::TaskRunner>&& io_thread_task_runner,
             embedder::ScopedPlatformHandle platform_handle);
 
   void OnShutdownCompleteImpl();
 
  private:
-  util::RefPtr<embedder::PlatformTaskRunner> io_thread_task_runner_;
+  util::RefPtr<platform::TaskRunner> io_thread_task_runner_;
 
   // Set after shut down.
   util::ManualResetWaitableEvent event_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(ScopedIPCSupportHelper);
 };
 
 }  // namespace internal
 
 // A simple class that calls |mojo::embedder::InitIPCSupport()| (with
 // |ProcessType::NONE|) on construction and |ShutdownIPCSupport()| on
 // destruction (or |ShutdownIPCSupportOnIOThread()| if destroyed on the I/O
 // thread).
 class ScopedIPCSupport final : public embedder::ProcessDelegate {
  public:
   explicit ScopedIPCSupport(
-      util::RefPtr<embedder::PlatformTaskRunner>&& io_thread_task_runner);
+      util::RefPtr<platform::TaskRunner>&& io_thread_task_runner);
   ~ScopedIPCSupport() override;
 
  private:
   // |ProcessDelegate| implementation:
   // Note: Executed on the I/O thread.
   void OnShutdownComplete() override;
 
   internal::ScopedIPCSupportHelper helper_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(ScopedIPCSupport);
 };
 
 // Like |ScopedIPCSupport|, but with |ProcessType::MASTER|. It will (optionally)
 // call a callback (on the I/O thread) on receiving |OnSlaveDisconnect()|.
 class ScopedMasterIPCSupport final : public embedder::MasterProcessDelegate {
  public:
   explicit ScopedMasterIPCSupport(
-      util::RefPtr<embedder::PlatformTaskRunner>&& io_thread_task_runner);
+      util::RefPtr<platform::TaskRunner>&& io_thread_task_runner);
   ScopedMasterIPCSupport(
-      util::RefPtr<embedder::PlatformTaskRunner>&& io_thread_task_runner,
+      util::RefPtr<platform::TaskRunner>&& io_thread_task_runner,
       base::Callback<void(embedder::SlaveInfo slave_info)> on_slave_disconnect);
   ~ScopedMasterIPCSupport() override;
 
  private:
   // |MasterProcessDelegate| implementation:
   // Note: Executed on the I/O thread.
   void OnShutdownComplete() override;
   void OnSlaveDisconnect(embedder::SlaveInfo slave_info) override;
 
   internal::ScopedIPCSupportHelper helper_;
   base::Callback<void(embedder::SlaveInfo slave_info)> on_slave_disconnect_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(ScopedMasterIPCSupport);
 };
 
 // Like |ScopedIPCSupport|, but with |ProcessType::SLAVE|. It will (optionally)
 // call a callback (on the I/O thread) on receiving |OnMasterDisconnect()|.
 class ScopedSlaveIPCSupport final : public embedder::SlaveProcessDelegate {
  public:
   ScopedSlaveIPCSupport(
-      util::RefPtr<embedder::PlatformTaskRunner>&& io_thread_task_runner,
+      util::RefPtr<platform::TaskRunner>&& io_thread_task_runner,
       embedder::ScopedPlatformHandle platform_handle);
   ScopedSlaveIPCSupport(
-      util::RefPtr<embedder::PlatformTaskRunner>&& io_thread_task_runner,
+      util::RefPtr<platform::TaskRunner>&& io_thread_task_runner,
       embedder::ScopedPlatformHandle platform_handle,
       base::Closure on_master_disconnect);
   ~ScopedSlaveIPCSupport() override;
 
  private:
   // |SlaveProcessDelegate| implementation:
   // Note: Executed on the I/O thread.
   void OnShutdownComplete() override;
   void OnMasterDisconnect() override;
 
   internal::ScopedIPCSupportHelper helper_;
   base::Closure on_master_disconnect_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(ScopedSlaveIPCSupport);
 };
 
 }  // namespace test
 }  // namespace mojo
 
 #endif  // MOJO_EDK_TEST_SCOPED_IPC_SUPPORT_H_