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

content/renderer/clipboard_client.h

Index: content/renderer/clipboard_client.h
diff --git a/content/renderer/clipboard_client.h b/content/renderer/clipboard_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..7f1b2dcfdff07c2058c178d8b44a2a1c6129c123
--- /dev/null
+++ b/content/renderer/clipboard_client.h
@@ -0,0 +1,81 @@
+// Copyright (c) 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 CONTENT_RENDERER_CLIPBOARD_CLIENT_H_
+#define CONTENT_RENDERER_CLIPBOARD_CLIENT_H_
+
+#include "content/common/clipboard_format.h"
+#include "ui/base/clipboard/clipboard.h"
+
+class GURL;
+
+namespace content {
+
+// Interface for the content embedder to implement to support clipboard.
+class ClipboardClient {
+ public:
+  class WriteContext {
+   public:
+    virtual ~WriteContext() { }
+
+    // Writes bitmap data into the context, updating the ObjectMap.
+    virtual void WriteBitmapFromPixels(ui::Clipboard::ObjectMap* objects,
+                                       const void* pixels,
+                                       const gfx::Size& size) = 0;
+
+    // Flushes all gathered data.
+    virtual void Flush(const ui::Clipboard::ObjectMap& objects) = 0;
+  };
+
+  virtual ~ClipboardClient() { }
+
+  // Get a clipboard that can be used to construct a ScopedClipboardWriterGlue.
+  virtual ui::Clipboard* GetClipboard() = 0;
+
+  // Get a sequence number which uniquely identifies clipboard state.
+  virtual uint64 GetSequenceNumber(ui::ClipboardType type) = 0;
+
+  // Tests whether the clipboard contains a certain format
+  virtual bool IsFormatAvailable(ClipboardFormat format,
+                                 ui::ClipboardType type) = 0;
+
+  // Clear the contents of the clipboard.
+  virtual void Clear(ui::ClipboardType type) = 0;
+
+  // Reads the available types from the clipboard, if available.
+  virtual void ReadAvailableTypes(ui::ClipboardType type,
+                                  std::vector<base::string16>* types,
+                                  bool* contains_filenames) = 0;
+
+  // Reads text from the clipboard, trying UNICODE first, then falling back to
+  // ASCII.
+  virtual void ReadText(ui::ClipboardType type,
+                        base::string16* result) = 0;
+
+  // Reads HTML from the clipboard, if available.
+  virtual void ReadHTML(ui::ClipboardType type,
+                        base::string16* markup,
+                        GURL* url,
+                        uint32* fragment_start,
+                        uint32* fragment_end) = 0;
+
+  // Reads RTF from the clipboard, if available.
+  virtual void ReadRTF(ui::ClipboardType type, std::string* result) = 0;
+
+  // Reads and image from the clipboard, if available.
+  virtual void ReadImage(ui::ClipboardType type, std::string* data) = 0;
+
+  // Reads a custom data type from the clipboard, if available.
+  virtual void ReadCustomData(ui::ClipboardType clipboard_type,
+                              const base::string16& type,
+                              base::string16* data) = 0;
+
+  // Creates a context to write clipboard data. May return NULL.
+  virtual WriteContext* CreateWriteContext() = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_CLIPBOARD_CLIENT_H_
+