Revert "Move mojo edk into mojo/edk"

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 "base/macros.h"
-#include "mojo/edk/embedder/platform_shared_buffer.h"
-#include "mojo/edk/system/memory.h"
-#include "mojo/edk/system/simple_dispatcher.h"
-#include "mojo/edk/system/system_impl_export.h"
-
-namespace mojo {
-
-namespace embedder {
-class PlatformSupport;
-}
-
-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 MOJO_SYSTEM_IMPL_EXPORT SharedBufferDispatcher : public SimpleDispatcher {
- public:
-  // 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;
-
-  // Validates and/or sets default options for |MojoCreateSharedBufferOptions|.
-  // If non-null, |in_options| must point to a struct of at least
-  // |in_options->struct_size| bytes. |out_options| must point to a (current)
-  // |MojoCreateSharedBufferOptions| and will be entirely overwritten on success
-  // (it may be partly overwritten on failure).
-  static MojoResult ValidateCreateOptions(
-      UserPointer<const MojoCreateSharedBufferOptions> in_options,
-      MojoCreateSharedBufferOptions* out_options);
-
-  // Static factory method: |validated_options| must be validated (obviously).
-  // On failure, |*result| will be left as-is.
-  static MojoResult Create(
-      embedder::PlatformSupport* platform_support,
-      const MojoCreateSharedBufferOptions& validated_options,
-      uint64_t num_bytes,
-      scoped_refptr<SharedBufferDispatcher>* result);
-
-  // |Dispatcher| public methods:
-  virtual Type GetType() const override;
-
-  // The "opposite" of |SerializeAndClose()|. (Typically this is called by
-  // |Dispatcher::Deserialize()|.)
-  static scoped_refptr<SharedBufferDispatcher> Deserialize(
-      Channel* channel,
-      const void* source,
-      size_t size,
-      embedder::PlatformHandleVector* platform_handles);
-
- private:
-  explicit SharedBufferDispatcher(
-      scoped_refptr<embedder::PlatformSharedBuffer> shared_buffer_);
-  virtual ~SharedBufferDispatcher();
-
-  // Validates and/or sets default options for
-  // |MojoDuplicateBufferHandleOptions|. If non-null, |in_options| must point to
-  // a struct of at least |in_options->struct_size| bytes. |out_options| must
-  // point to a (current) |MojoDuplicateBufferHandleOptions| and will be
-  // entirely overwritten on success (it may be partly overwritten on failure).
-  static MojoResult ValidateDuplicateOptions(
-      UserPointer<const MojoDuplicateBufferHandleOptions> in_options,
-      MojoDuplicateBufferHandleOptions* out_options);
-
-  // |Dispatcher| protected methods:
-  virtual void CloseImplNoLock() override;
-  virtual scoped_refptr<Dispatcher>
-  CreateEquivalentDispatcherAndCloseImplNoLock() override;
-  virtual MojoResult DuplicateBufferHandleImplNoLock(
-      UserPointer<const MojoDuplicateBufferHandleOptions> options,
-      scoped_refptr<Dispatcher>* new_dispatcher) override;
-  virtual MojoResult MapBufferImplNoLock(
-      uint64_t offset,
-      uint64_t num_bytes,
-      MojoMapBufferFlags flags,
-      scoped_ptr<embedder::PlatformSharedBufferMapping>* mapping) override;
-  virtual void StartSerializeImplNoLock(Channel* channel,
-                                        size_t* max_size,
-                                        size_t* max_platform_handles) override;
-  virtual bool EndSerializeAndCloseImplNoLock(
-      Channel* channel,
-      void* destination,
-      size_t* actual_size,
-      embedder::PlatformHandleVector* platform_handles) override;
-
-  scoped_refptr<embedder::PlatformSharedBuffer> shared_buffer_;
-
-  DISALLOW_COPY_AND_ASSIGN(SharedBufferDispatcher);
-};
-
-}  // namespace system
-}  // namespace mojo
-
-#endif  // MOJO_EDK_SYSTEM_SHARED_BUFFER_DISPATCHER_H_