Disable flaky KillGuestCommunicatingWithWrongAppView on Linux.

chrome/browser/apps/guest_view/app_view_browsertest.cc

 // Copyright 2014 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 <utility>
 
 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
 #include "components/guest_view/browser/guest_view_manager.h"
@@ skipping 220 matching lines @@
   int invalid_guest_instance_id =
       test_guest_view_manager()->GetNextInstanceID();
   // Call the desired function to verify that the |bad_app| gets killed if
   // the provided |guest_instance_id| is not mapped to any "GuestView"'s.
   extensions::AppViewGuest::CompletePendingRequest(
       browser()->profile(), GURL("about:blank"), invalid_guest_instance_id,
       bad_app->id(), bad_app_render_process_host);
   exit_observer.WaitUntilRenderProcessHostKilled();
 }
 
-IN_PROC_BROWSER_TEST_P(AppViewTest, KillGuestCommunicatingWithWrongAppView) {
+#if defined(OS_LINUX)
+#define MAYBE_KillGuestCommunicatingWithWrongAppView \
+    DISABLED_KillGuestCommunicatingWithWrongAppView
+#else
+#define MAYBE_KillGuestCommunicatingWithWrongAppView \
+    KillGuestCommunicatingWithWrongAppView
+#endif
+IN_PROC_BROWSER_TEST_P(AppViewTest,
+                       MAYBE_KillGuestCommunicatingWithWrongAppView) {
   const extensions::Extension* host_app =
       LoadAndLaunchPlatformApp("app_view/host_app", "AppViewTest.LAUNCHED");
   const extensions::Extension* guest_app =
       InstallPlatformApp("app_view/guest_app");
   const extensions::Extension* bad_app =
       LoadAndLaunchPlatformApp("app_view/bad_app", "AppViewTest.LAUNCHED");
   // The host app attemps to embed the guest
   EXPECT_TRUE(content::ExecuteScript(
       extensions::AppWindowRegistry::Get(browser()->profile())
           ->GetCurrentAppWindowForApp(host_app->id())
@@ skipping 19 matching lines @@
   extensions::AppRuntimeEventRouter::DispatchOnEmbedRequestedEvent(
       browser()->profile(), std::move(fake_embed_request_param), bad_app);
   bad_app_obs.WaitUntilRenderProcessHostKilled();
   // Now ask the guest to continue embedding.
   ASSERT_TRUE(
       ExecuteScript(extensions::ProcessManager::Get(browser()->profile())
                         ->GetBackgroundHostForExtension(guest_app->id())
                         ->web_contents(),
                     "continueEmbedding();"));
 }