Disable all the tests that are flaking more than 5% on Linux builders.

chrome/browser/extensions/api/app_window/app_window_apitest.cc

Index: chrome/browser/extensions/api/app_window/app_window_apitest.cc
diff --git a/chrome/browser/extensions/api/app_window/app_window_apitest.cc b/chrome/browser/extensions/api/app_window/app_window_apitest.cc
index 5b20a4226b85d87f31c8734628324d0d1f95ba6e..b67b2464a352d5796ae855e95fdf6d51c1567fbd 100644
--- a/chrome/browser/extensions/api/app_window/app_window_apitest.cc
+++ b/chrome/browser/extensions/api/app_window/app_window_apitest.cc
@@ -48,7 +48,14 @@ class TestAppWindowRegistryObserver : public apps::AppWindowRegistry::Observer {
 namespace extensions {
 
 // Tests chrome.app.window.setIcon.
-IN_PROC_BROWSER_TEST_F(ExperimentalPlatformAppBrowserTest, WindowsApiSetIcon) {
+#if defined(OS_WIN) || defined(OS_LINUX)
+// http://crbug.com/396466
+#define MAYBE_WindowsApiSetIcon DISABLED_WindowsApiSetIcon
+#else
+#define MAYBE_WindowsApiSetIcon WindowsApiSetIcon
+#endif
+IN_PROC_BROWSER_TEST_F(ExperimentalPlatformAppBrowserTest,
+                       MAYBE_WindowsApiSetIcon) {
   scoped_ptr<TestAppWindowRegistryObserver> test_observer(
       new TestAppWindowRegistryObserver(browser()->profile()));
   LoadAndLaunchPlatformApp("windows_api_set_icon", "IconSet");