Skeleton of sync handler on the I/O thread for GetSearchProviderInstallState.

chrome/browser/renderer_host/resource_message_filter.h

Index: chrome/browser/renderer_host/resource_message_filter.h
diff --git a/chrome/browser/renderer_host/resource_message_filter.h b/chrome/browser/renderer_host/resource_message_filter.h
index 6f47917c03d5a67ad22c95591b0d65d1221cdcaa..c81728c2dd2acdd3d49137fbc3462776b125ead0 100644
--- a/chrome/browser/renderer_host/resource_message_filter.h
+++ b/chrome/browser/renderer_host/resource_message_filter.h
@@ -42,6 +42,7 @@ class IndexedDBDispatcherHost;
 class NotificationsPrefsCache;
 class Profile;
 class RenderWidgetHelper;
+class SearchProviderInstallStateDispatcherHost;
 class URLRequestContextGetter;
 struct ViewHostMsg_CreateWindow_Params;
 struct ViewHostMsg_CreateWorker_Params;
@@ -468,6 +469,10 @@ class ResourceMessageFilter : public IPC::ChannelProxy::MessageFilter,
   // Used to handle geolocation-related messages.
   scoped_refptr<GeolocationDispatcherHost> geolocation_dispatcher_host_;
 
+  // Used to handle search provider related messages.
+  scoped_ptr<SearchProviderInstallStateDispatcherHost>
+      search_provider_install_state_dispatcher_host_;
+
   // Used to handle device orientation related messages.
   scoped_refptr<device_orientation::DispatcherHost>
       device_orientation_dispatcher_host_;