[sql] Enable HAVE_USLEEP for more platforms.

sql/sqlite_features_unittest.cc

Index: sql/sqlite_features_unittest.cc
diff --git a/sql/sqlite_features_unittest.cc b/sql/sqlite_features_unittest.cc
index 1aff80e9bbac20d11dfe40c9e90e0021166de30c..987d3a1f5d193ccb2b398a047266fa2db4d34d74 100644
--- a/sql/sqlite_features_unittest.cc
+++ b/sql/sqlite_features_unittest.cc
@@ -112,4 +112,21 @@ TEST_F(SQLiteFeaturesTest, FTS3_Prefix) {
 }
 #endif
 
+#if !defined(USE_SYSTEM_SQLITE)
+// Verify that Chromium's SQLite is compiled with HAVE_USLEEP defined.  With
+// HAVE_USLEEP, SQLite uses usleep() with millisecond granularity.  Otherwise it
+// uses sleep() with second granularity.
+TEST_F(SQLiteFeaturesTest, UsesUsleep) {
+  base::TimeTicks before = base::TimeTicks::Now();
+  sqlite3_sleep(1);
+  base::TimeDelta delta = base::TimeTicks::Now() - before;
+
+  // It is not impossible for this to be over 1000 if things are compiled the
+  // right way.  But it is very unlikely, most platforms seem to be around
+  // <TBD>.
+  LOG(ERROR) << "Milliseconds: " << delta.InMilliseconds();
+  EXPECT_LT(delta.InMilliseconds(), 1000);
+}
+#endif
+
 }  // namespace