Improve the error message in BuildTime.InThePast to help figure out the problem.

base/build_time_unittest.cc

Index: base/build_time_unittest.cc
diff --git a/base/build_time_unittest.cc b/base/build_time_unittest.cc
index 30d541aed1c8db7b293e8e8f3546b69a3d376f6d..e21aed9fadb8aa712c68b4de4e26324c483e6d9f 100644
--- a/base/build_time_unittest.cc
+++ b/base/build_time_unittest.cc
@@ -16,15 +16,7 @@ TEST(BuildTime, DateLooksValid) {
   EXPECT_EQ(' ', build_date[6]);
 }
 
-TEST(BuildTime, TimeLooksValid) {

[Nico, 2016/03/30 20:34:00]

what's wrong with this test?

…oh. Yes, this is not a useful test.

-  char build_time[] = "00:00:00";
-
-  EXPECT_EQ(8u, strlen(build_time));
-  EXPECT_EQ(':', build_time[2]);
-  EXPECT_EQ(':', build_time[5]);
-}
-
 TEST(BuildTime, InThePast) {
-  EXPECT_TRUE(base::GetBuildTime() < base::Time::Now());
-  EXPECT_TRUE(base::GetBuildTime() < base::Time::NowFromSystemTime());
+  EXPECT_LT(base::GetBuildTime(), base::Time::Now());
+  EXPECT_LT(base::GetBuildTime(), base::Time::NowFromSystemTime());
 }