Add PluginDataRemover.

webkit/glue/plugins/plugin_instance.cc

Index: webkit/glue/plugins/plugin_instance.cc
diff --git a/webkit/glue/plugins/plugin_instance.cc b/webkit/glue/plugins/plugin_instance.cc
index b271e4d85c96e5792e40e41d3d56d8870fe92631..65ae0b64e74e53289d77b917c5d1882d4d1fcb0a 100644
--- a/webkit/glue/plugins/plugin_instance.cc
+++ b/webkit/glue/plugins/plugin_instance.cc
@@ -342,6 +342,14 @@ bool PluginInstance::NPP_Print(NPPrint* platform_print) {
   return false;
 }
 
+NPError PluginInstance::NPP_ClearSiteData(uint64 flags,
+                                          const char* domain,
+                                          uint64 max_age) {
+  DCHECK(npp_functions_ != 0);
+  // TODO(bauerb): Call NPAPI function when it is defined in the header.
+  return NPERR_NO_ERROR;
+}
+
 void PluginInstance::SendJavaScriptStream(const GURL& url,
                                           const std::string& result,
                                           bool success,