Enable external popup menu in Blimp, part 2/2.

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 bf1f7cfa2e0f5eae92b9069c4d1c81a2d586bf3d..d9f323bbc607e69274c4f9d347bc45a60f5c9faa 100644
--- a/blimp/engine/session/blimp_engine_session.cc
+++ b/blimp/engine/session/blimp_engine_session.cc
@@ -38,10 +38,12 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
+#include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/common/menu_item.h"
 #include "net/base/ip_address.h"
 #include "net/base/net_errors.h"
 #include "ui/aura/client/default_capture_client.h"
@@ -626,6 +628,22 @@ void BlimpEngineSession::RenderViewDeleted(
                                                render_view_host->GetWidget());
 }
 
+void BlimpEngineSession::ShowPopupMenu(
+    content::RenderFrameHost* render_frame_host,
+    const gfx::Rect& bounds,
+    int item_height,
+    double item_font_size,
+    int selected_item,
+    const std::vector<content::MenuItem>& items,
+    bool right_aligned,
+    bool allow_multiple_selection) {
+  NOTIMPLEMENTED() << " show " << items.size() << " items.";
+}
+
+void BlimpEngineSession::HidePopupMenu() {
+  NOTIMPLEMENTED();
+}
+
 void BlimpEngineSession::SendPageLoadStatusUpdate(PageLoadStatus load_status) {
   bool page_load_completed = false;