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

base/build_time.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 "base/logging.h"
 #include "base/time/time.h"
 
 namespace base {
 
 Time GetBuildTime() {
   Time integral_build_time;
   // The format of __DATE__ and __TIME__ is specified by the ANSI C Standard,
   // section 6.8.8.
   //
   // __DATE__ is exactly "Mmm DD YYYY".
   // __TIME__ is exactly "hh:mm:ss".
+#if defined(DONT_EMBED_BUILD_METADATA)
+  const char kDateTime[] = "Sep 02 2008 08:00:00 PST";
+#else
   const char kDateTime[] = __DATE__ " " __TIME__ " PST";
+#endif
   bool result = Time::FromString(kDateTime, &integral_build_time);
   DCHECK(result);
   return integral_build_time;
 }
 
 }  // namespace base