Add SafeMin() and SafeMax(), which accept args of different types

webrtc/base/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/crypto.gni")
 import("//build/config/ui.gni")
@@ skipping 147 matching lines @@
     "rate_limiter.h",
     "rate_statistics.cc",
     "rate_statistics.h",
     "ratetracker.cc",
     "ratetracker.h",
     "refcount.h",
     "refcountedobject.h",
     "safe_compare.h",
     "safe_conversions.h",
     "safe_conversions_impl.h",
+    "safe_minmax.h",
     "sanitizer.h",
     "scoped_ref_ptr.h",
     "string_to_number.cc",
     "string_to_number.h",
     "stringencode.cc",
     "stringencode.h",
     "stringutils.cc",
     "stringutils.h",
     "swap_queue.h",
     "template_util.h",
@@ skipping 608 matching lines @@
       "onetimeevent_unittest.cc",
       "optional_unittest.cc",
       "pathutils_unittest.cc",
       "platform_thread_unittest.cc",
       "random_unittest.cc",
       "rate_limiter_unittest.cc",
       "rate_statistics_unittest.cc",
       "ratetracker_unittest.cc",
       "refcountedobject_unittest.cc",
       "safe_compare_unittest.cc",
+      "safe_minmax_unittest.cc",
       "string_to_number_unittest.cc",
       "stringencode_unittest.cc",
       "stringutils_unittest.cc",
       "swap_queue_unittest.cc",
       "thread_annotations_unittest.cc",
       "thread_checker_unittest.cc",
       "timestampaligner_unittest.cc",
       "timeutils_unittest.cc",
     ]
     deps = [
@@ skipping 105 matching lines @@
 
 if (is_android) {
   android_library("base_java") {
     java_files = [
       "java/src/org/webrtc/Logging.java",
       "java/src/org/webrtc/Size.java",
       "java/src/org/webrtc/ThreadUtils.java",
     ]
   }
 }