Add gear menu to /downloads and /external_storage.

chrome/browser/resources/file_manager/js/file_manager_commands.js

Index: chrome/browser/resources/file_manager/js/file_manager_commands.js
diff --git a/chrome/browser/resources/file_manager/js/file_manager_commands.js b/chrome/browser/resources/file_manager/js/file_manager_commands.js
index 9160562b44c77ad82931fbcf05fef42bfe65273f..e4d3b5a5b4e907ca91a8b0777816688281bc90ae 100644
--- a/chrome/browser/resources/file_manager/js/file_manager_commands.js
+++ b/chrome/browser/resources/file_manager/js/file_manager_commands.js
@@ -35,11 +35,21 @@ CommandUtil.getCommandRootType = function(event, rootsList) {
  * @param {Event} event Command event to mark.
  * @param {FileManager} fileManager FileManager to use.
  */
-CommandUtil.canExecuteOnDriveOnly = function(event, fileManager) {
+CommandUtil.canExecuteEnabledOnDriveOnly = function(event, fileManager) {
   event.canExecute = fileManager.isOnDrive();
 };
 
 /**
+ * Checks if command should be visible on drive.
+ * @param {Event} event Command event to mark.
+ * @param {FileManager} fileManager FileManager to use.
+ */
+CommandUtil.canExecuteVisibleOnDriveOnly = function(event, fileManager) {
+  event.canExecute = fileManager.isOnDrive();
+  event.command.setHidden(!fileManager.isOnDrive());
+};
+
+/**
  * Returns a single selected/passed entry or null.
  * @param {Event} event Command event.
  * @param {FileManager} fileManager FileManager to use.
@@ -250,7 +260,9 @@ Commands.driveHelpCommand = {
   execute: function() {
     window.open(FileManager.GOOGLE_DRIVE_HELP, 'help');
   },
-  canExecute: CommandUtil.canExecuteOnDriveOnly
+  canExecute: function(event, fileManager) {
+    event.canExecute = true;
+  }
 };
 
 /**
@@ -260,7 +272,7 @@ Commands.driveBuySpaceCommand = {
   execute: function() {
     window.open(FileManager.GOOGLE_DRIVE_BUY_STORAGE, 'buy-more-space');
   },
-  canExecute: CommandUtil.canExecuteOnDriveOnly
+  canExecute: CommandUtil.canExecuteVisibleOnDriveOnly
 };
 
 /**
@@ -270,7 +282,7 @@ Commands.driveClearCacheCommand = {
   execute: function() {
     chrome.fileBrowserPrivate.clearDriveCache();
   },
-  canExecute: CommandUtil.canExecuteOnDriveOnly
+  canExecute: CommandUtil.canExecuteVisibleOnDriveOnly
 };
 
 /**
@@ -280,7 +292,7 @@ Commands.driveReloadCommand = {
   execute: function() {
     chrome.fileBrowserPrivate.reloadDrive();
   },
-  canExecute: CommandUtil.canExecuteOnDriveOnly
+  canExecute: CommandUtil.canExecuteVisibleOnDriveOnly
 };
 
 /**
@@ -290,7 +302,7 @@ Commands.driveGoToDriveCommand = {
   execute: function() {
     window.open(FileManager.GOOGLE_DRIVE_ROOT, 'drive-root');
   },
-  canExecute: CommandUtil.canExecuteOnDriveOnly
+  canExecute: CommandUtil.canExecuteVisibleOnDriveOnly
 };
 
 /**