Disable WebViewAPITest.AcceptTouchEvents on Linux.

extensions/browser/guest_view/web_view/web_view_apitest.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 "extensions/browser/guest_view/web_view/web_view_apitest.h"
 
 #include "base/command_line.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 253 matching lines @@
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   command_line->AppendSwitchASCII(switches::kForceDeviceScaleFactor,
                                   base::StringPrintf("%f", scale()));
   WebViewAPITest::SetUp();
 }
 
 content::WebContents* WebViewAPITest::GetGuestWebContents() {
   return GetGuestViewManager()->WaitForSingleGuestCreated();
 }
 
-IN_PROC_BROWSER_TEST_F(WebViewAPITest, AcceptTouchEvents) {
+// Occasionally hits NOTIMPLEMENTED on Linux.  https://crbug.com/422998
+#if defined(OS_LINUX)
+#define MAYBE_AcceptTouchEvents DISABLED_AcceptTouchEvents
+#else
+#define MAYBE_AcceptTouchEvents AcceptTouchEvents
+#endif
+IN_PROC_BROWSER_TEST_F(WebViewAPITest, MAYBE_AcceptTouchEvents) {
   LaunchApp("web_view/accept_touch_events");
 
   content::RenderViewHost* embedder_rvh =
       GetEmbedderWebContents()->GetRenderViewHost();
 
   bool embedder_has_touch_handler =
       content::RenderViewHostTester::HasTouchEventHandler(embedder_rvh);
   EXPECT_FALSE(embedder_has_touch_handler);
 
   SendMessageToGuestAndWait("install-touch-handler", "installed-touch-handler");
@@ skipping 378 matching lines @@
 // object, on the webview element, and hanging directly off webview.
 IN_PROC_BROWSER_TEST_F(WebViewAPITest, TestWebRequestAPIExistence) {
   RunTest("testWebRequestAPIExistence", "web_view/apitest");
 }
 
 IN_PROC_BROWSER_TEST_F(WebViewAPITest, TestWebRequestAPIGoogleProperty) {
   RunTest("testWebRequestAPIGoogleProperty", "web_view/apitest");
 }
 
 }  // namespace extensions