Add SetImageData api to chrome.clipboard.

extensions/browser/api/extensions_api_client.cc

Index: extensions/browser/api/extensions_api_client.cc
diff --git a/extensions/browser/api/extensions_api_client.cc b/extensions/browser/api/extensions_api_client.cc
index 878f7180def0baa349786111112af9c256ef97e9..297475d5bd573aecc6a1f5b652886101cc2a1220 100644
--- a/extensions/browser/api/extensions_api_client.cc
+++ b/extensions/browser/api/extensions_api_client.cc
@@ -103,4 +103,12 @@ MetricsPrivateDelegate* ExtensionsAPIClient::GetMetricsPrivateDelegate() {
   return nullptr;
 }
 
+#if defined(OS_CHROMEOS)
+void ExtensionsAPIClient::SaveImageDataToClipboard(
+    const std::vector<char>& image_data,
+    api::clipboard::ImageType type,
+    const base::Closure& success_callback,
+    const base::Callback<void(const std::string&)>& error_callback) {}
+#endif
+
 }  // namespace extensions