Disable flaky LauncherPlatformAppBrowserTest SetIcon test.

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

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller_browsertest.cc
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_browsertest.cc b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_browsertest.cc
index 48a46aec8377f382065a5b2db41dd91f1f69c502..6a181cfd2c38e54ba34329cdba44562fd06140a5 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_browsertest.cc
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_browsertest.cc
@@ -857,8 +857,9 @@ IN_PROC_BROWSER_TEST_F(LauncherPlatformAppBrowserTest, BrowserActivation) {
   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.