Add SetImageData api to chrome.clipboard.

extensions/browser/test_extensions_browser_client.h

Index: extensions/browser/test_extensions_browser_client.h
diff --git a/extensions/browser/test_extensions_browser_client.h b/extensions/browser/test_extensions_browser_client.h
index ee572fae7981186a5f417f603c919937c0669d4e..10aed4e0c1228b657d083651f3a7a5bb90816f02 100644
--- a/extensions/browser/test_extensions_browser_client.h
+++ b/extensions/browser/test_extensions_browser_client.h
@@ -62,6 +62,10 @@ class TestExtensionsBrowserClient : public ExtensionsBrowserClient {
 #if defined(OS_CHROMEOS)
   std::string GetUserIdHashFromContext(
       content::BrowserContext* context) override;
+  void SaveImageDataToClipboard(const std::vector<char>& image_data,
+                                api::clipboard::ImageType type,
+                                const base::Closure& success_callback,
+                                const ErrorCallback& error_callback) override;
 #endif
   bool IsGuestSession(content::BrowserContext* context) const override;
   bool IsExtensionIncognitoEnabled(