Revert of Add build_config_functions.h to avoid #ifdef

sandbox/linux/tests/unit_tests.cc

 // Copyright (c) 2012 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 <fcntl.h>
 #include <poll.h>
 #include <signal.h>
 #include <stdio.h>
 #include <sys/resource.h>
 #include <sys/time.h>
@@ skipping 23 matching lines @@
   if (task_d != 0 || task_stat.st_nlink < 3)
     return -1;
   const int num_threads = task_stat.st_nlink - 2;
   return num_threads;
 }
 
 }  // namespace
 
 namespace sandbox {
 
+bool IsAndroid() {
+#if defined(OS_ANDROID)
+  return true;
+#else
+  return false;
+#endif
+}
+
+bool IsArchitectureArm() {
+#if defined(ARCH_CPU_ARM_FAMILY)
+  return true;
+#else
+  return false;
+#endif
+}
+
 // TODO(jln): figure out why base/.../dynamic_annotations.h's
 // RunningOnValgrind() cannot link.
 bool IsRunningOnValgrind() { return RUNNING_ON_VALGRIND; }
 
 static const int kExpectedValue = 42;
 static const int kIgnoreThisTest = 43;
 static const int kExitWithAssertionFailure = 1;
 static const int kExitForTimeout = 2;
 
 static void SigAlrmHandler(int) {
@@ skipping 182 matching lines @@
   fflush(stderr);
   _exit(kExitWithAssertionFailure);
 }
 
 void UnitTests::IgnoreThisTest() {
   fflush(stderr);
   _exit(kIgnoreThisTest);
 }
 
 }  // namespace