Mojo: Increase epsilon in tests.

mojo/system/waiter_unittest.cc

 // Copyright 2013 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.
 
 // NOTE(vtl): These tests are inherently flaky (e.g., if run on a heavily-loaded
 // system). Sorry. |kEpsilonMicros| may be increased to increase tolerance and
 // reduce observed flakiness.
 
 #include "mojo/system/waiter.h"
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/platform_thread.h"  // For |Sleep()|.
 #include "base/threading/simple_thread.h"
 #include "base/time/time.h"
 #include "mojo/system/test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace system {
 namespace {
 
 const int64_t kMicrosPerMs = 1000;
-const int64_t kEpsilonMicros = 15 * kMicrosPerMs;  // 15 ms.
+const int64_t kEpsilonMicros = 30 * kMicrosPerMs;  // 15 ms.
 const int64_t kPollTimeMicros = 10 * kMicrosPerMs;  // 10 ms.
 
 class WaitingThread : public base::SimpleThread {
  public:
   explicit WaitingThread(MojoDeadline deadline)
       : base::SimpleThread("waiting_thread"),
         deadline_(deadline),
         done_(false),
         result_(MOJO_RESULT_UNKNOWN),
         elapsed_micros_(-1) {
@@ skipping 240 matching lines @@
     thread.WaitUntilDone(&result, &elapsed_micros);
     EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, result);
     EXPECT_GT(elapsed_micros, (1-1) * kEpsilonMicros);
     EXPECT_LT(elapsed_micros, (1+1) * kEpsilonMicros);
   }
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo