Modify SetImageData to add additional items along with image data to save on clipboard.

chrome/browser/extensions/clipboard_extension_helper_chromeos.h

Index: chrome/browser/extensions/clipboard_extension_helper_chromeos.h
diff --git a/chrome/browser/extensions/clipboard_extension_helper_chromeos.h b/chrome/browser/extensions/clipboard_extension_helper_chromeos.h
index 78f6aebc949547077228e3d454d1c642ac1fe17c..a8745b83c558af90d989b7cade3b2e8c833ae01c 100644
--- a/chrome/browser/extensions/clipboard_extension_helper_chromeos.h
+++ b/chrome/browser/extensions/clipboard_extension_helper_chromeos.h
@@ -9,6 +9,7 @@
 #include <vector>
 
 #include "base/callback.h"
+#include "extensions/browser/api/clipboard/clipboard_api.h"
 #include "extensions/common/api/clipboard.h"
 
 class SkBitmap;
@@ -26,6 +27,7 @@ class ClipboardExtensionHelper {
   void DecodeAndSaveImageData(
       const std::vector<char>& data,
       api::clipboard::ImageType type,
+      AdditionalDataItemList additional_items,
       const base::Closure& success_callback,
       const base::Callback<void(const std::string&)>& error_callback);
 
@@ -43,6 +45,7 @@ class ClipboardExtensionHelper {
   std::unique_ptr<ClipboardImageDataDecoder> clipboard_image_data_decoder_;
   base::Closure image_save_success_callback_;
   base::Callback<void(const std::string&)> image_save_error_callback_;
+  AdditionalDataItemList additonal_items_;
 
   DISALLOW_COPY_AND_ASSIGN(ClipboardExtensionHelper);
 };