Add assigner support to Blimp

blimp/client/app/linux/blimp_client_session_linux.cc

Index: blimp/client/app/linux/blimp_client_session_linux.cc
diff --git a/blimp/client/app/linux/blimp_client_session_linux.cc b/blimp/client/app/linux/blimp_client_session_linux.cc
index d4491be8695d0b6c7461d7fa0393cd779d207559..84317ca5c8dc37848fd2f621eae8c9da7f0ff53a 100644
--- a/blimp/client/app/linux/blimp_client_session_linux.cc
+++ b/blimp/client/app/linux/blimp_client_session_linux.cc
@@ -59,10 +59,8 @@ void FakeNavigationFeatureDelegate::OnLoadingChanged(int tab_id, bool loading) {
 
 }  // namespace
 
-BlimpClientSessionLinux::BlimpClientSessionLinux(
-    scoped_ptr<AssignmentSource> assignment_source)
-    : BlimpClientSession(std::move(assignment_source)),
-      event_source_(ui::PlatformEventSource::CreateDefault()),
+BlimpClientSessionLinux::BlimpClientSessionLinux()
+    : event_source_(ui::PlatformEventSource::CreateDefault()),
       navigation_feature_delegate_(new FakeNavigationFeatureDelegate) {
   blimp_display_manager_.reset(new BlimpDisplayManager(gfx::Size(800, 600),
                                                        this,