Disable flaky LauncherPlatformAppBrowserTest SetIcon test.

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

 // Copyright 2013 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 "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"
 
 #include <stddef.h>
 
 #include "ash/public/cpp/shelf_item_delegate.h"
 #include "ash/public/cpp/window_properties.h"
@@ skipping 839 matching lines @@
   ASSERT_EQ(item_count, shelf_model()->item_count());
   const ash::ShelfItem& item1 = GetLastLauncherItem();
   ash::ShelfID item_id1 = item1.id;
   EXPECT_EQ(ash::TYPE_APP, item1.type);
   EXPECT_EQ(ash::STATUS_ACTIVE, item1.status);
 
   ash::wm::ActivateWindow(browser()->window()->GetNativeWindow());
   EXPECT_EQ(ash::STATUS_RUNNING, shelf_model()->ItemByID(item_id1)->status);
 }
 
+// Flaky on Linux ChromiumOS bot -- crbug/720601.
 // Test that opening an app sets the correct icon
-IN_PROC_BROWSER_TEST_F(LauncherPlatformAppBrowserTest, SetIcon) {
+IN_PROC_BROWSER_TEST_F(LauncherPlatformAppBrowserTest, DISABLED_SetIcon) {
   TestAppWindowRegistryObserver test_observer(browser()->profile());
 
   // Enable experimental APIs to allow panel creation.
   base::CommandLine::ForCurrentProcess()->AppendSwitch(
       extensions::switches::kEnableExperimentalExtensionApis);
 
   int base_shelf_item_count = shelf_model()->item_count();
   ExtensionTestMessageListener completed_listener("Completed", false);
   LoadAndLaunchPlatformApp("app_icon", "Launched");
 
@@ skipping 1540 matching lines @@
 
   // Close all windows via the menu item.
   CloseBrowserWindow(browser(), menu1.get(), LauncherContextMenu::MENU_CLOSE);
   EXPECT_EQ(0u, BrowserList::GetInstance()->size());
 
   // Check if "Close" is removed from the context menu.
   std::unique_ptr<LauncherContextMenu> menu2 = CreateBrowserItemContextMenu();
   ASSERT_FALSE(
       IsItemPresentInMenu(menu2.get(), LauncherContextMenu::MENU_CLOSE));
 }