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..0115b12e7e41290c4b9884eabb4c5b8c5afd9cd6 100644
--- a/webkit/glue/plugins/plugin_instance.cc
+++ b/webkit/glue/plugins/plugin_instance.cc
@@ -342,6 +342,16 @@ 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);
+  if (npp_functions_->clearsitedata != 0) {
+    return npp_functions_->clearsitedata(npp_, flags, domain, max_age);
+  }
+  return NPERR_INVALID_FUNCTABLE_ERROR;
+}
+
 void PluginInstance::SendJavaScriptStream(const GURL& url,
                                           const std::string& result,
                                           bool success,