Add SetImageData api to chrome.clipboard.

extensions/browser/test_extensions_browser_client.cc

Index: extensions/browser/test_extensions_browser_client.cc
diff --git a/extensions/browser/test_extensions_browser_client.cc b/extensions/browser/test_extensions_browser_client.cc
index 32bcfce5890b186174bb033e8c6a331686293411..094d29d0ea792341e7a4cd23635ac00bcae7fb4c 100644
--- a/extensions/browser/test_extensions_browser_client.cc
+++ b/extensions/browser/test_extensions_browser_client.cc
@@ -83,6 +83,12 @@ std::string TestExtensionsBrowserClient::GetUserIdHashFromContext(
     content::BrowserContext* context) {
   return "";
 }
+
+void TestExtensionsBrowserClient::SaveImageDataToClipboard(
+    const std::vector<char>& image_data,
+    const api::clipboard::ImageType type,
+    const base::Closure& success_callback,
+    const ErrorCallback& error_callback) {}
 #endif
 
 bool TestExtensionsBrowserClient::IsGuestSession(