Implement base::PowerMonitor::IsOnBatteryPower() for OSX.

base/BUILD.gn

 # Copyright (c) 2013 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.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 1289 matching lines @@
       "winmm.lib",
     ]
     all_dependent_configs = [ ":base_win_linker_flags" ]
   } else if (!is_nacl || is_nacl_nonsfi) {
     # Non-Windows.
     deps += [ "//base/third_party/libevent" ]
   }
 
   # Desktop Mac.
   if (is_mac) {
+    sources -= [ "power_monitor/power_monitor_device_source_posix.cc" ]

[Nico, 2016/09/20 00:04:13]

(fwiw, instead of "add all, then subtract", in gn we do "only add what we need
in the first place" -- so instead of removing it here, only add it if !is_mac
further up)

[DaleCurtis, 2016/09/21 22:49:39]

Done. Fixed all the existing cases.

+
     libs = [
       "ApplicationServices.framework",
       "AppKit.framework",
       "bsm",
       "CoreFoundation.framework",
       "IOKit.framework",
       "Security.framework",
     ]
   }
 
@@ skipping 1135 matching lines @@
     testonly = true
     deps = [
       ":base_java",
     ]
     java_files = [
       "test/android/java/src/org/chromium/base/ContentUriTestUtils.java",
       "test/android/java/src/org/chromium/base/TestSystemMessageHandler.java",
     ]
   }
 }