Allow MessageFilters to restrict listening to specific message classes

content/browser/renderer_host/clipboard_message_filter.cc

Index: content/browser/renderer_host/clipboard_message_filter.cc
diff --git a/content/browser/renderer_host/clipboard_message_filter.cc b/content/browser/renderer_host/clipboard_message_filter.cc
index 6ba95f8f12cc72f4a3aca96d747f619504d0d355..6d13257ba1bc0538302aa070c844356f725eb9d2 100644
--- a/content/browser/renderer_host/clipboard_message_filter.cc
+++ b/content/browser/renderer_host/clipboard_message_filter.cc
@@ -19,9 +19,12 @@
 
 namespace content {
 
-
 namespace {
 
+const uint32 kFilteredMessageClasses[] = {
+  ClipboardMsgStart,
+};
+
 // On Windows, the write must be performed on the UI thread because the
 // clipboard object from the IO thread cannot create windows so it cannot be
 // the "owner" of the clipboard's contents. See http://crbug.com/5823.
@@ -34,7 +37,9 @@ void WriteObjectsOnUIThread(ui::Clipboard::ObjectMap* objects) {
 }  // namespace
 
 
-ClipboardMessageFilter::ClipboardMessageFilter() {}
+ClipboardMessageFilter::ClipboardMessageFilter()
+    : BrowserMessageFilter(
+          kFilteredMessageClasses, arraysize(kFilteredMessageClasses)) {}
 
 void ClipboardMessageFilter::OverrideThreadForMessage(
     const IPC::Message& message, BrowserThread::ID* thread) {