Disable ConstrainedWindowViewTest.BackspaceSentToWebContent on Linux ChromiumOS.

chrome/browser/ui/views/constrained_window_views_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/memory/weak_ptr.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
@@ skipping 288 matching lines @@
   ui::KeyEvent* native_ui_key_event = &key;
 #elif defined(OS_WIN)
   MSG native_ui_key_event = native_key_event;
 #endif
 
   host->ForwardKeyboardEvent(
       content::NativeWebKeyboardEvent(native_ui_key_event));
 }
 
 // Tests that backspace is not processed before it's sent to the web contents.
-// Flaky on win aura. crbug.com/170331
-#if defined(OS_WIN) && defined(USE_AURA)
+// Flaky on Win Aura and Linux ChromiumOS. See http://crbug.com/170331
+#if defined(USE_AURA)
 #define MAYBE_BackspaceSentToWebContent DISABLED_BackspaceSentToWebContent
 #else
 #define MAYBE_BackspaceSentToWebContent BackspaceSentToWebContent
 #endif
 IN_PROC_BROWSER_TEST_F(ConstrainedWindowViewTest,
                        MAYBE_BackspaceSentToWebContent) {
   content::WebContents* web_contents =
       browser()->tab_strip_model()->GetActiveWebContents();
   ASSERT_TRUE(web_contents != NULL);
 
@@ skipping 54 matching lines @@
   // Escape is not processed as accelerator before it's sent to web contents.
   EXPECT_FALSE(observer.widget_closed());
 
   content::RunAllPendingInMessageLoop();
 
   // Escape is processed as accelerator after it's sent to web contents.
   EXPECT_TRUE(observer.widget_closed());
 }
 
 #endif  // defined(OS_WIN) || (defined(USE_AURA) && defined(USE_X11))