Disable PreloadInstant on cros.

chrome/browser/instant/instant_browsertest.cc

 // Copyright (c) 2012 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/command_line.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_edit.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
@@ skipping 707 matching lines @@
   // Navigate to a new URL. The searchBox values should stay cleared.
   ui_test_utils::NavigateToURL(
       browser(), test_server()->GetURL("files/empty.html"));
 
   ASSERT_TRUE(GetStringFromJavascript(browser()->GetSelectedWebContents(),
       "window.chrome.searchBox.value", &value));
   EXPECT_EQ("", value);
 }
 
 // Tests that instant search is preloaded whenever the omnibox gets focus.
+// PreloadsInstant fails on linux_chromeos trybots all the time, possibly
+// because of http://crbug.com/80118.
+#if defined(OS_CHROMEOS)
+IN_PROC_BROWSER_TEST_F(InstantTest, DISABLED_PreloadsInstant) {
+#else
 IN_PROC_BROWSER_TEST_F(InstantTest, MAYBE(PreloadsInstant)) {
+#endif
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kPreloadInstantSearch);
   ASSERT_TRUE(test_server()->Start());
   EnableInstant();
   SetupInstantProvider("instant.html");
 
   // The omnibox gets focus before the test begins. At that time, there was no
   // instant controller (which was only created after EnableInstant()), so no
   // preloading happened. Unfocus the omnibox with ClickOnView(), so that when
   // we focus it again, the controller will preload instant search.
@@ skipping 259 matching lines @@
   // Press <Enter> in the omnibox, causing the preview to be committed.
   WebContents* preview_tab = preview()->web_contents();
   ASSERT_TRUE(PressEnter());
 
   // The preview contents should now be the active tab contents.
   EXPECT_FALSE(preview());
   EXPECT_FALSE(instant()->is_displayable());
   EXPECT_FALSE(instant()->IsCurrent());
   EXPECT_EQ(preview_tab, browser()->GetSelectedWebContents());
 }