Add ContextMenuSourceType to views::ContextMenuController::ShowContextMenuForView.

ash/launcher/launcher_button.cc

Index: ash/launcher/launcher_button.cc
diff --git a/ash/launcher/launcher_button.cc b/ash/launcher/launcher_button.cc
index 8c15a226d969d5f4a0f80874ec1f12374b98c52d..f275b0a0b33e4f023c29d1ca1596307d9601d268 100644
--- a/ash/launcher/launcher_button.cc
+++ b/ash/launcher/launcher_button.cc
@@ -327,14 +327,14 @@ gfx::Rect LauncherButton::GetIconBounds() const {
 }
 
 void LauncherButton::ShowContextMenu(const gfx::Point& p,
-                                     bool is_mouse_gesture) {
+                                     ui::MenuSourceType source_type) {
   if (!context_menu_controller())
     return;
 
   bool destroyed = false;
   destroyed_flag_ = &destroyed;
 
-  CustomButton::ShowContextMenu(p, is_mouse_gesture);
+  CustomButton::ShowContextMenu(p, source_type);
 
   if (!destroyed) {
     destroyed_flag_ = NULL;