EDK: Remove MOJO_SYSTEM_IMPL_EXPORT, system_impl_export.h, etc.

mojo/edk/system/waiter.h

 // Copyright 2013 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_SYSTEM_WAITER_H_
 #define MOJO_EDK_SYSTEM_WAITER_H_
 
 #include <stdint.h>
 
 #include "base/synchronization/condition_variable.h"
 #include "base/synchronization/lock.h"
 #include "mojo/edk/system/awakable.h"
-#include "mojo/edk/system/system_impl_export.h"
 #include "mojo/public/c/system/types.h"
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
 namespace system {
 
 // IMPORTANT (all-caps gets your attention, right?): |Waiter| methods are called
 // under other locks, in particular, |Dispatcher::lock_|s, so |Waiter| methods
 // must never call out to other objects (in particular, |Dispatcher|s). This
 // class is thread-safe.
-class MOJO_SYSTEM_IMPL_EXPORT Waiter final : public Awakable {
+class Waiter final : public Awakable {
  public:
   Waiter();
-  ~Waiter();
+  ~Waiter() override;
 
   // A |Waiter| can be used multiple times; |Init()| should be called before
   // each time it's used.
   void Init();
 
   // Waits until a suitable |Awake()| is called. (|context| may be null, in
   // which case, obviously no context is ever returned.)
   // Returns:
   //   - The result given to the first call to |Awake()| (possibly before this
   //     call to |Wait()|); in this case, |*context| is set to the value passed
@@ skipping 32 matching lines @@
   MojoResult awake_result_;
   uintptr_t awake_context_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(Waiter);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_WAITER_H_