Add SetImageData api to chrome.clipboard.

extensions/browser/extensions_browser_client.h

Index: extensions/browser/extensions_browser_client.h
diff --git a/extensions/browser/extensions_browser_client.h b/extensions/browser/extensions_browser_client.h
index c27ae730663b75f95d0985b78f29ba111fdff8ee..0c227eaebb6d9f3e8d97d113bfad90e338915475 100644
--- a/extensions/browser/extensions_browser_client.h
+++ b/extensions/browser/extensions_browser_client.h
@@ -222,6 +222,13 @@ class ExtensionsBrowserClient {
   // is left up to the embedder.
   virtual bool IsMinBrowserVersionSupported(const std::string& min_version) = 0;
 
+  // Saves image data on clipboard.
+  virtual void SaveImageDataToClipboard(
+      const std::vector<char>& image_data,
+      const std::string& type,
+      const base::Closure& success_callback,
+      const base::Closure& error_callback) = 0;
+
   // Embedders can override this function to handle extension errors.
   virtual void ReportError(content::BrowserContext* context,
                            std::unique_ptr<ExtensionError> error);