Have ScopedClipboardWriter and Clipboard::WriteObjects take a buffer parameter.

ui/base/clipboard/scoped_clipboard_writer.h

Index: ui/base/clipboard/scoped_clipboard_writer.h
diff --git a/ui/base/clipboard/scoped_clipboard_writer.h b/ui/base/clipboard/scoped_clipboard_writer.h
index 08aaa3a21b9625fabeb5d4b2b24d71e31bbab200..f89141fdaedf9b3b0464df6669e6da46de23ae37 100644
--- a/ui/base/clipboard/scoped_clipboard_writer.h
+++ b/ui/base/clipboard/scoped_clipboard_writer.h
@@ -29,7 +29,7 @@ namespace ui {
 class UI_EXPORT ScopedClipboardWriter {
  public:
   // Create an instance that is a simple wrapper around clipboard.
-  explicit ScopedClipboardWriter(Clipboard* clipboard);
+  ScopedClipboardWriter(Clipboard* clipboard, Clipboard::Buffer buffer);
 
   ~ScopedClipboardWriter();
 
@@ -72,6 +72,7 @@ class UI_EXPORT ScopedClipboardWriter {
   // vector, and pass it to Clipboard::WriteObjects() during object destruction.
   Clipboard::ObjectMap objects_;
   Clipboard* clipboard_;
+  Clipboard::Buffer buffer_;
 
   // We keep around the UTF-8 text of the URL in order to pass it to
   // Clipboard::DidWriteURL().