Implement WaitSetDispatcher::WaitSetWaitImpl().

mojo/edk/system/shared_buffer_dispatcher.h

 // 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.
 
 #ifndef MOJO_EDK_SYSTEM_SHARED_BUFFER_DISPATCHER_H_
 #define MOJO_EDK_SYSTEM_SHARED_BUFFER_DISPATCHER_H_
 
 #include <utility>
 
 #include "mojo/edk/system/memory.h"
@@ skipping 14 matching lines @@
 class PlatformSharedBufferMapping;
 }
 
 namespace system {
 
 // TODO(vtl): We derive from SimpleDispatcher, even though we don't currently
 // have anything that's waitable. I want to add a "transferrable" wait flag
 // (which would entail overriding |GetHandleSignalsStateImplNoLock()|, etc.).
 class SharedBufferDispatcher final : public SimpleDispatcher {
  public:
-  // The default/standard rights for a shared buffer handle. Note that they're
-  // duplicatable by default.
+  // The default/standard rights for a shared buffer handle. Note that shared
+  // buffer handles are duplicatable by default.
   static constexpr MojoHandleRights kDefaultHandleRights =
       MOJO_HANDLE_RIGHT_DUPLICATE | MOJO_HANDLE_RIGHT_TRANSFER |
       MOJO_HANDLE_RIGHT_GET_OPTIONS | MOJO_HANDLE_RIGHT_SET_OPTIONS |
       MOJO_HANDLE_RIGHT_MAP_READABLE | MOJO_HANDLE_RIGHT_MAP_WRITABLE |
       MOJO_HANDLE_RIGHT_MAP_EXECUTABLE;
 
   // The default options to use for |MojoCreateSharedBuffer()|. (Real uses
   // should obtain this via |ValidateCreateOptions()| with a null |in_options|;
   // this is exposed directly for testing convenience.)
   static const MojoCreateSharedBufferOptions kDefaultCreateOptions;
@@ skipping 78 matching lines @@
   util::RefPtr<platform::PlatformSharedBuffer> shared_buffer_
       MOJO_GUARDED_BY(mutex());
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(SharedBufferDispatcher);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_SHARED_BUFFER_DISPATCHER_H_