Disable flaky TimerTest.DelayTimer_Reset test.

base/timer_unittest.cc

Index: base/timer_unittest.cc
diff --git a/base/timer_unittest.cc b/base/timer_unittest.cc
index 665a0666ffb8d4bb8c2231581a1c5b3c2eabe9af..74c6a6630742891fd9979faab9c3c8fe4db2dfab 100644
--- a/base/timer_unittest.cc
+++ b/base/timer_unittest.cc
@@ -318,7 +318,9 @@ TEST(TimerTest, DelayTimer_OneCall) {
   RunTest_DelayTimer_OneCall(MessageLoop::TYPE_IO);
 }
 
-TEST(TimerTest, DelayTimer_Reset) {
+// Disabled because it's flaky on the buildbot. Bug not filed because this
+// kind of test is difficult to make not-flaky on buildbots.
+TEST(TimerTest, DISABLED_DelayTimer_Reset) {
   RunTest_DelayTimer_Reset(MessageLoop::TYPE_DEFAULT);
   RunTest_DelayTimer_Reset(MessageLoop::TYPE_UI);
   RunTest_DelayTimer_Reset(MessageLoop::TYPE_IO);