Fixed flaky EphemeralAppService unit tests

chrome/browser/apps/ephemeral_app_service_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.
 
 #include <algorithm>
 
 #include "base/rand_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
 #include "chrome/browser/apps/ephemeral_app_service.h"
@@ skipping 55 matching lines @@
         removed_apps.insert(*it);
         launch_times.erase(it++);
       } else {
         ++it;
       }
     }
 
     if (launch_times.empty())
       return;
 
-    // Verify that the removed apps have launch times earlier than all retained
-    // apps. We can actually just compare with the first entry in |launch_times|
-    // but will make no implementation assumptions.
+    // Verify that the removed apps have launch times earlier than or equal to
+    // all retained apps. We can actually just compare with the first entry in
+    // |launch_times| but will make no implementation assumptions.
     for (LaunchTimeAppMap::const_iterator removed = removed_apps.begin();
          removed != removed_apps.end(); ++removed) {
       for (LaunchTimeAppMap::iterator retained = launch_times.begin();
          retained != launch_times.end(); ++retained) {
-        EXPECT_TRUE(removed->first < retained->first);
+        EXPECT_LE(removed->first, retained->first);
       }
     }
   }
 
   // Generate X app launch times, N days before the reference time.
   // If |generated_ids| is not NULL, the generated app IDs will be added
   // to the set.
   void GenerateLaunchTimes(const base::Time& reference_time,
                            int days_before,
                            int count,
@@ skipping 163 matching lines @@
   const int kRunningApps = 3;
   AddIntermediateApps(
       time_now,
       EphemeralAppService::kMaxEphemeralAppsCount,
       &launch_times);  // overflow
   RunTestCheckLRU(
       launch_times.size() + kRunningApps,
       launch_times,
       kRunningApps);
 }