blimp: Add settings to allow the client to download the whole page.

blimp/engine/session/blimp_engine_session.cc

Index: blimp/engine/session/blimp_engine_session.cc
diff --git a/blimp/engine/session/blimp_engine_session.cc b/blimp/engine/session/blimp_engine_session.cc
index 9543a83ddd5962832eda067bdb310e92faa39681..a445b659d90102bffed7f0642b19fe57199a77b7 100644
--- a/blimp/engine/session/blimp_engine_session.cc
+++ b/blimp/engine/session/blimp_engine_session.cc
@@ -180,6 +180,8 @@ BlimpEngineSession::BlimpEngineSession(
     : browser_context_(std::move(browser_context)),
       engine_config_(engine_config),
       screen_(new BlimpScreen),
+      settings_feature_(&settings_manager_),
+      render_widget_feature_(&settings_manager_),
       net_components_(
           new EngineNetworkComponents(net_log,
                                       QuitCurrentMessageLoopClosure())) {
@@ -257,6 +259,11 @@ void BlimpEngineSession::RegisterFeatures() {
   render_widget_feature_.set_compositor_message_sender(
       thread_pipe_manager_->RegisterFeature(BlimpMessage::COMPOSITOR,
                                             &render_widget_feature_));
+
+  // The Settings feature does not need an outgoing message processor, since we
+  // don't send any messages to the client right now.
+  thread_pipe_manager_->RegisterFeature(BlimpMessage::SETTINGS,
+                                        &settings_feature_);
 }
 
 bool BlimpEngineSession::CreateWebContents(const int target_tab_id) {