MSan: increase the test timeout multiplier to 6x.

base/test/test_timeouts.cc

 // Copyright (c) 2011 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 "base/test/test_timeouts.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/test/test_switches.h"
 
 namespace {
 
 // ASan/TSan/MSan instrument each memory access. This may slow the execution
 // down significantly.
 #if defined(MEMORY_SANITIZER)
-static const int kTimeoutMultiplier = 4;
+// For MSan the slowdown depends heavily on the value of msan_track_origins GYP
+// flag. The multiplier below corresponds to msan_track_origins=1.
+static const int kTimeoutMultiplier = 6;
 #elif defined(ADDRESS_SANITIZER) || defined(THREAD_SANITIZER) || \
     defined(SYZYASAN)
 static const int kTimeoutMultiplier = 2;
 #else
 static const int kTimeoutMultiplier = 1;
 #endif
 
 const int kAlmostInfiniteTimeoutMs = 100000000;
 
 // Sets value to the greatest of:
@@ skipping 71 matching lines @@
   InitializeTimeout(switches::kTestLauncherTimeout, action_timeout_ms_,
                     &test_launcher_timeout_ms_);
 
   // The timeout values should be increasing in the right order.
   CHECK(tiny_timeout_ms_ <= action_timeout_ms_);
   CHECK(action_timeout_ms_ <= action_max_timeout_ms_);
   CHECK(action_max_timeout_ms_ <= large_test_timeout_ms_);
 
   CHECK(action_timeout_ms_ <= test_launcher_timeout_ms_);
 }