Mark DevToolsPixelOutputTests.TestLatencyInfoInstrumentation flaky on linux.

chrome/browser/devtools/devtools_sanity_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 <stddef.h>
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/cancelable_callback.h"
@@ skipping 1410 matching lines @@
 #else
 #define MAYBE_TestScreenshotRecording TestScreenshotRecording
 #endif
 IN_PROC_BROWSER_TEST_F(DevToolsPixelOutputTests,
                        MAYBE_TestScreenshotRecording) {
   RunTest("testScreenshotRecording", std::string());
 }
 
 // This test enables switches::kUseGpuInTests which causes false positives
 // with MemorySanitizer.
-#if defined(MEMORY_SANITIZER) || defined(ADDRESS_SANITIZER) || defined(OS_WIN)
+// Flaky on Linux and Windows https://crbug.com/624215
+#if defined(MEMORY_SANITIZER) || defined(ADDRESS_SANITIZER) || \
+    defined(OS_WIN) || defined(OS_LINUX)
 #define MAYBE_TestLatencyInfoInstrumentation \
   DISABLED_TestLatencyInfoInstrumentation
 #else
 #define MAYBE_TestLatencyInfoInstrumentation TestLatencyInfoInstrumentation
 #endif
 IN_PROC_BROWSER_TEST_F(DevToolsPixelOutputTests,
                        MAYBE_TestLatencyInfoInstrumentation) {
   WebContents* web_contents = GetInspectedTab();
   OpenDevToolsWindow(kLatencyInfoTestPage, false);
   DispatchAndWait("startTimeline");
@@ skipping 106 matching lines @@
 
   DevToolsWindowTesting::CloseDevToolsWindowSync(window);
   content::WebUIControllerFactory::UnregisterFactoryForTesting(&test_factory);
 }
 
 // Tests scripts panel showing.
 IN_PROC_BROWSER_TEST_F(DevToolsSanityTest, TestDevToolsSharedWorker) {
   RunTest("testDevToolsSharedWorker", url::kAboutBlankURL);
 }