Add SetImageData api to chrome.clipboard.

extensions/browser/api/clipboard/clipboard_api.h

 // Copyright (c) 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 EXTENSIONS_BROWSER_API_CLIPBOARD_CLIPBOARD_API_H_
 #define EXTENSIONS_BROWSER_API_CLIPBOARD_CLIPBOARD_API_H_
 
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "extensions/browser/extension_function.h"
+#include "extensions/common/api/clipboard.h"
 #include "ui/base/clipboard/clipboard_observer.h"
 
 namespace extensions {
 
 class ClipboardAPI : public BrowserContextKeyedAPI,
                      public ui::ClipboardObserver {
  public:
   explicit ClipboardAPI(content::BrowserContext* context);
   ~ClipboardAPI() override;
 
   // BrowserContextKeyedAPI implementation.
   static BrowserContextKeyedAPIFactory<ClipboardAPI>* GetFactoryInstance();
 
   // ui::ClipboardObserver implementation.
   void OnClipboardDataChanged() override;
 
  private:
   friend class BrowserContextKeyedAPIFactory<ClipboardAPI>;
 
   // BrowserContextKeyedAPI implementation.
   static const char* service_name() { return "ClipboardAPI"; }
 
   content::BrowserContext* const browser_context_;
 };
 
+class ClipboardSetImageDataFunction : public UIThreadExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("clipboard.setImageData", CLIPBOARD_SETIMAGEDATA);
+
+ protected:
+  ~ClipboardSetImageDataFunction() override;
+  ResponseAction Run() override;
+
+  void OnSaveImageDataSuccess();
+  void OnSaveImageDataError(const std::string& error);
+};
+
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_CLIPBOARD_CLIPBOARD_API_H_