Disable WebContentsViewAuraTest.VerticalOverscroll on ChromeOS

content/browser/web_contents/web_contents_view_aura_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 "content/browser/web_contents/web_contents_view_aura.h"
 
 #include <stddef.h>
 #include <tuple>
 
 #include "base/command_line.h"
@@ skipping 985 matching lines @@
     WaitAFrame();
 
     if (!navigated)
       EXPECT_EQ(10, ExecuteScriptAndExtractInt("touchmoveCount"));
     else
       EXPECT_GT(10, ExecuteScriptAndExtractInt("touchmoveCount"));
   }
 }
 
 // Test that vertical overscroll updates are sent only when a user overscrolls
-// vertically.
-#if defined(OS_WIN)
+// vertically. Flaky on several platforms. https://crbug.com/679420
+#if defined(OS_WIN) || defined(OS_CHROMEOS)
 #define MAYBE_VerticalOverscroll DISABLED_VerticalOverscroll
 #else
 #define MAYBE_VerticalOverscroll VerticalOverscroll
 #endif
 
 IN_PROC_BROWSER_TEST_F(WebContentsViewAuraTest, MAYBE_VerticalOverscroll) {
   base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
       switches::kScrollEndEffect, "1");
 
   ASSERT_NO_FATAL_FAILURE(StartTestWithPage("about:blank"));
@@ skipping 111 matching lines @@
     details = dispatcher->OnEventFromSource(&release);
     ASSERT_FALSE(details.dispatcher_destroyed);
     WaitAFrame();
 
     EXPECT_LT(0, tracker.num_overscroll_updates());
     EXPECT_FALSE(tracker.overscroll_completed());
   }
 }
 
 }  // namespace content