Disable flaky test BackgroundTracingThrottleTimeElapsed on Linux

chrome/browser/tracing/chrome_tracing_delegate_browsertest.cc

Index: chrome/browser/tracing/chrome_tracing_delegate_browsertest.cc
diff --git a/chrome/browser/tracing/chrome_tracing_delegate_browsertest.cc b/chrome/browser/tracing/chrome_tracing_delegate_browsertest.cc
index 4f65fae2f6d937dd2825a53db4fab44ee2d1d72a..7b4504cfc82dc1ead7837f2b566e47be4eae1757 100644
--- a/chrome/browser/tracing/chrome_tracing_delegate_browsertest.cc
+++ b/chrome/browser/tracing/chrome_tracing_delegate_browsertest.cc
@@ -151,8 +151,16 @@ IN_PROC_BROWSER_TEST_F(ChromeTracingDelegateBrowserTest,
       base::Closure(), content::BackgroundTracingManager::NO_DATA_FILTERING));
 }
 
+// Flaky on Linux. See https://crbug.com/723933.
+#if defined(OS_LINUX)
+#define MAYBE_BackgroundTracingThrottleTimeElapsed \
+  DISABLED_BackgroundTracingThrottleTimeElapsed
+#else
+#define MAYBE_BackgroundTracingThrottleTimeElapsed \
+  BackgroundTracingThrottleTimeElapsed
+#endif
 IN_PROC_BROWSER_TEST_F(ChromeTracingDelegateBrowserTest,
-                       BackgroundTracingThrottleTimeElapsed) {
+                       MAYBE_BackgroundTracingThrottleTimeElapsed) {
   base::RunLoop wait_for_upload;
 
   EXPECT_TRUE(StartPreemptiveScenario(