Add option to install an ephemeral app to ChromeOS shelf context menu

chrome/browser/ui/ash/launcher/launcher_context_menu.cc

Index: chrome/browser/ui/ash/launcher/launcher_context_menu.cc
diff --git a/chrome/browser/ui/ash/launcher/launcher_context_menu.cc b/chrome/browser/ui/ash/launcher/launcher_context_menu.cc
index 4369c3dd2fbe72dfbca897310bd7db0dfc84020a..eb7322b0d71f19706b3dd043a19064fc46de4f8c 100644
--- a/chrome/browser/ui/ash/launcher/launcher_context_menu.cc
+++ b/chrome/browser/ui/ash/launcher/launcher_context_menu.cc
@@ -146,6 +146,7 @@ void LauncherContextMenu::Init() {
         AddItem(
             MENU_PIN,
             l10n_util::GetStringUTF16(IDS_LAUNCHER_CONTEXT_MENU_PIN));
+        AddItem(MENU_INSTALL, l10n_util::GetStringUTF16(IDS_APP_INSTALL_TITLE));
       }
       if (controller_->IsOpen(item_.id)) {
         AddItem(MENU_CLOSE,
@@ -260,6 +261,21 @@ bool LauncherContextMenu::IsCommandIdEnabled(int command_id) const {
   }
 }
 
+bool LauncherContextMenu::IsCommandIdVisible(int command_id) const {
+  if (item_.type != ash::TYPE_PLATFORM_APP)
+    return true;
+
+  switch (command_id) {
+    case MENU_PIN:
+      return controller_->IsPinnable(item_.id) &&
+             !controller_->CanInstall(item_.id);
+    case MENU_INSTALL:
+      return controller_->CanInstall(item_.id);
+    default:
+      return true;
+  }
+}
+
 bool LauncherContextMenu::GetAcceleratorForCommandId(
       int command_id,
       ui::Accelerator* accelerator) {
@@ -285,6 +301,9 @@ void LauncherContextMenu::ExecuteCommand(int command_id, int event_flags) {
     case MENU_PIN:
       controller_->TogglePinned(item_.id);
       break;
+    case MENU_INSTALL:
+      controller_->Install(item_.id);
+      break;
     case LAUNCH_TYPE_PINNED_TAB:
       controller_->SetLaunchType(item_.id, extensions::LAUNCH_TYPE_PINNED);
       break;