Put some references to __DATE__ and __TIME__ behind a preprocessor flag.

base/build_time_unittest.cc

 // Copyright (c) 2011 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 "base/build_time.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 TEST(BuildTime, DateLooksValid) {
+#if !defined(DONT_EMBED_BUILD_METADATA)
   char build_date[] = __DATE__;
+#else
+  char build_date[] = "Sep 02 2008";
+#endif
 
   EXPECT_EQ(11u, strlen(build_date));
   EXPECT_EQ(' ', build_date[3]);
   EXPECT_EQ(' ', build_date[6]);
 }
 
 TEST(BuildTime, TimeLooksValid) {
+#if defined(DONT_EMBED_BUILD_METADATA)
+  char build_time[] = "08:00:00";
+#else
   char build_time[] = __TIME__;
+#endif
 
   EXPECT_EQ(8u, strlen(build_time));
   EXPECT_EQ(':', build_time[2]);
   EXPECT_EQ(':', build_time[5]);
 }
 
 TEST(BuildTime, DoesntCrash) {
   // Since __DATE__ isn't updated unless one does a clobber build, we can't
   // really test the value returned by it, except to check that it doesn't
   // crash.
   base::GetBuildTime();
 }