Add ContextMenuSourceType to views::ContextMenuController::ShowContextMenuForView.

ash/launcher/launcher.cc

Index: ash/launcher/launcher.cc
diff --git a/ash/launcher/launcher.cc b/ash/launcher/launcher.cc
index 335029a316a19cc714e25e548fa310d6c51e3a9b..8991c352bf44e0a13346d5c327ce8f7df00ab77d 100644
--- a/ash/launcher/launcher.cc
+++ b/ash/launcher/launcher.cc
@@ -130,10 +130,6 @@ bool Launcher::IsShowingMenu() const {
   return launcher_view_->IsShowingMenu();
 }
 
-void Launcher::ShowContextMenu(const gfx::Point& location) {
-  launcher_view_->ShowContextMenu(location, false);
-}
-
 bool Launcher::IsShowingOverflowBubble() const {
   return launcher_view_->IsShowingOverflowBubble();
 }