Revert of Rewrite clipboard write IPC handling to be easier to understand.

content/renderer/renderer_clipboard_client.h

Index: content/renderer/renderer_clipboard_client.h
diff --git a/content/renderer/renderer_clipboard_client.h b/content/renderer/renderer_clipboard_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..de9e9c1486412f0e1d4665d3f764320e4fafd049
--- /dev/null
+++ b/content/renderer/renderer_clipboard_client.h
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 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 CONTENT_RENDERER_RENDERER_CLIPBOARD_CLIENT_H_
+#define CONTENT_RENDERER_RENDERER_CLIPBOARD_CLIENT_H_
+
+#include "base/compiler_specific.h"
+#include "content/renderer/clipboard_client.h"
+
+namespace content {
+
+// An implementation of ClipboardClient that gets and sends data over IPC.
+class RendererClipboardClient : public ClipboardClient {
+ public:
+  RendererClipboardClient();
+  ~RendererClipboardClient() override;
+
+  ui::Clipboard* GetClipboard() override;
+  uint64 GetSequenceNumber(ui::ClipboardType type) override;
+  bool IsFormatAvailable(ClipboardFormat format,
+                         ui::ClipboardType type) override;
+  void Clear(ui::ClipboardType type) override;
+  void ReadAvailableTypes(ui::ClipboardType type,
+                          std::vector<base::string16>* types,
+                          bool* contains_filenames) override;
+  void ReadText(ui::ClipboardType type, base::string16* result) override;
+  void ReadHTML(ui::ClipboardType type,
+                base::string16* markup,
+                GURL* url,
+                uint32* fragment_start,
+                uint32* fragment_end) override;
+  void ReadRTF(ui::ClipboardType type, std::string* result) override;
+  void ReadImage(ui::ClipboardType type, std::string* data) override;
+  void ReadCustomData(ui::ClipboardType clipboard_type,
+                      const base::string16& type,
+                      base::string16* data) override;
+  WriteContext* CreateWriteContext() override;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_RENDERER_CLIPBOARD_CLIENT_H_