Add setSelection function to automation API.

chrome/browser/extensions/api/automation/automation_apitest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/path_service.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 149 matching lines @@
 IN_PROC_BROWSER_TEST_F(AutomationApiTest, DesktopActions) {
   AutomationManagerAura::GetInstance()->Enable(browser()->profile());
   // Trigger the shelf subtree to be computed.
   ash::Shell::GetInstance()->accelerator_controller()->PerformActionIfEnabled(
       ash::FOCUS_SHELF);
 
   ASSERT_TRUE(RunExtensionSubtest("automation/tests/desktop", "actions.html"))
       << message_;
 }
 
+IN_PROC_BROWSER_TEST_F(AutomationApiTest, DesktopSelection) {

[David Tseng, 2015/09/23 17:57:41]

FYI; I used desktop mainly to mean the views+web trees. Selection may better
belong under the tabs directory.

+  ASSERT_TRUE(RunExtensionSubtest("automation/tests/desktop", "selection.html"))
+      << message_;
+}
+
 // Flaky, see http://crbug.com/435449
 IN_PROC_BROWSER_TEST_F(AutomationApiTest, DISABLED_DesktopLoadTabs) {
   ASSERT_TRUE(RunExtensionSubtest("automation/tests/desktop", "load_tabs.html"))
       << message_;
 }
 #endif  // defined(OS_CHROMEOS)
 #else  // !defined(USE_AURA)
 IN_PROC_BROWSER_TEST_F(AutomationApiTest, DesktopNotSupported) {
   ASSERT_TRUE(RunExtensionSubtest("automation/tests/desktop",
                                   "desktop_not_supported.html"))
@@ skipping 26 matching lines @@
       << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(AutomationApiTest, TreeChange) {
   StartEmbeddedTestServer();
   ASSERT_TRUE(RunExtensionSubtest("automation/tests/tabs", "tree_change.html"))
       << message_;
 }
 
 }  // namespace extensions