Allow MessageFilters to restrict listening to specific message classes

content/browser/quota_dispatcher_host.cc

Index: content/browser/quota_dispatcher_host.cc
diff --git a/content/browser/quota_dispatcher_host.cc b/content/browser/quota_dispatcher_host.cc
index 2351269cbaad21efc4dab9ba16d5b744a969e454..3d42f40e32dc9cb9fdb63c001ee6e53f8291bbc2 100644
--- a/content/browser/quota_dispatcher_host.cc
+++ b/content/browser/quota_dispatcher_host.cc
@@ -19,6 +19,11 @@ using quota::QuotaStatusCode;
 using quota::StorageType;
 
 namespace content {
+namespace {
+const uint32 kFilteredMessageClasses[] = {
+  QuotaMsgStart,
+};
+}  // namespace
 
 // Created one per request to carry the request's request_id around.
 // Dispatches requests from renderer/worker to the QuotaManager and
@@ -221,7 +226,9 @@ QuotaDispatcherHost::QuotaDispatcherHost(
     int process_id,
     QuotaManager* quota_manager,
     QuotaPermissionContext* permission_context)
-    : process_id_(process_id),
+    : BrowserMessageFilter(
+          kFilteredMessageClasses, arraysize(kFilteredMessageClasses)),
+      process_id_(process_id),
       quota_manager_(quota_manager),
       permission_context_(permission_context),
       weak_factory_(this) {