Revert of Implement ui::ClipboardMus.

components/mus/clipboard/clipboard_impl.h

 // Copyright 2016 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 COMPONENTS_MUS_CLIPBOARD_CLIPBOARD_IMPL_H_
 #define COMPONENTS_MUS_CLIPBOARD_CLIPBOARD_IMPL_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 22 matching lines @@
 
   void AddBinding(mojom::ClipboardRequest request);
 
   // mojom::Clipboard implementation.
   void GetSequenceNumber(
       mojom::Clipboard::Type clipboard_type,
       const GetSequenceNumberCallback& callback) override;
   void GetAvailableMimeTypes(
       mojom::Clipboard::Type clipboard_types,
       const GetAvailableMimeTypesCallback& callback) override;
-  void ReadClipboardData(mojom::Clipboard::Type clipboard_type,
-                         const mojo::String& mime_type,
-                         const ReadClipboardDataCallback& callback) override;
+  void ReadMimeType(
+      uint64_t sequence,
+      mojom::Clipboard::Type clipboard_type,
+      const mojo::String& mime_type,
+      const ReadMimeTypeCallback& callback) override;
   void WriteClipboardData(
       mojom::Clipboard::Type clipboard_type,
       mojo::Map<mojo::String, mojo::Array<uint8_t>> data,
       const WriteClipboardDataCallback& callback) override;
 
  private:
   // Internal struct which stores the current state of the clipboard.
   class ClipboardData;
 
   // The current clipboard state. This is what is read from.
   std::unique_ptr<ClipboardData> clipboard_state_[kNumClipboards];
   mojo::BindingSet<mojom::Clipboard> bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(ClipboardImpl);
 };
 
 }  // namespace clipboard
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_CLIPBOARD_CLIPBOARD_IMPL_H_