gn: simplify dbus logic in device/battery

device/battery/BUILD.gn

Index: device/battery/BUILD.gn
diff --git a/device/battery/BUILD.gn b/device/battery/BUILD.gn
index 17cd64d8ce436418d4c6288717fe174bb188f0c3..29d31aa19d5bc12974ef3b66443bf6b1b47c16f1 100644
--- a/device/battery/BUILD.gn
+++ b/device/battery/BUILD.gn
@@ -46,9 +46,7 @@ if (!is_android) {
         "battery_status_manager_default.cc",
         "battery_status_manager_linux.cc",
       ]
-    }
-
-    if (is_desktop_linux) {
+    } else if (is_linux && !is_chromeos) {

[timvolodine, 2016/02/10 12:40:40]

can we just have a separate "if (is_linux &&!is_chrome_os)" without the "else"
because the "!is_chromeos" is kind of redundant with the "else if". For
readability I think it's good to keep the system sections as separate "ifs" as
we have for all other mac and win below.

[Mostyn Bramley-Moore, 2016/02/10 13:01:51]

Done.

       if (use_dbus) {
         configs += [ "//build/config/linux:dbus" ]
         deps += [ "//dbus" ]