Bump mac deployment target to 10.9

webrtc/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.
 
 # TODO(kjellander): Rebase this to webrtc/build/common.gypi changes after r6330.
 
@@ skipping 533 matching lines @@
 
     if (rtc_enable_protobuf) {
       deps += [ "logging:rtc_event_log_tests" ]
     }
 
     if (is_android) {
       deps += [ "//testing/android/native_test:native_test_support" ]
       shard_timeout = 900
     }
 
-    if (is_ios || (is_mac && mac_deployment_target == "10.7")) {
+    if (is_ios || is_mac) {
       deps += [
         "sdk:rtc_sdk_peerconnection_objc",
         "system_wrappers:system_wrappers_default",
       ]
       sources += [
         "sdk/objc/Framework/UnitTests/RTCConfigurationTest.mm",
         "sdk/objc/Framework/UnitTests/RTCDataChannelConfigurationTest.mm",
         "sdk/objc/Framework/UnitTests/RTCIceCandidateTest.mm",
         "sdk/objc/Framework/UnitTests/RTCIceServerTest.mm",
         "sdk/objc/Framework/UnitTests/RTCMediaConstraintsTest.mm",
@@ skipping 165 matching lines @@
 
       deps = [
         "//base:base_java_test_support",
         "//webrtc/api:libjingle_peerconnection_java",
         "//webrtc/api:libjingle_peerconnection_jni",
         "//webrtc/examples:AppRTCMobile_javalib",
       ]
     }
   }
 }