libcros: Watch for display brightness changes.

SConstruct.chromiumos

Index: SConstruct.chromiumos
diff --git a/SConstruct.chromiumos b/SConstruct.chromiumos
index a1622992a3e7727b189e31587132892bedc5e1a7..10a55826ee32ddc5325e6c23e873699ddf133d6d 100644
--- a/SConstruct.chromiumos
+++ b/SConstruct.chromiumos
@@ -72,27 +72,29 @@ base_env.Append(CPPPATH=Split('. ..'))
 base_env.Append(CCFLAGS=Split('-ggdb -fPIC -fno-exceptions -Wall -Werror'))
 base_env.Append(LINKFLAGS=Split('-fPIC'))
 
-SOURCES=['chromeos_cryptohome.cc',
-         'chromeos_imageburn.cc',
-         'chromeos_input_method.cc',
-         'chromeos_input_method_ui.cc',
-         'chromeos_keyboard.cc',
-         'chromeos_login.cc',
-         'chromeos_login_helpers.cc',
-         'chromeos_mount.cc',
-         'chromeos_network.cc',
-         'chromeos_power.cc',
-         'chromeos_screen_lock.cc',
-         'chromeos_speech_synthesis.cc',
-         'chromeos_synaptics.cc',
-         'chromeos_syslogs.cc',
-         'chromeos_system.cc',
-         'chromeos_touchpad.cc',
-         'chromeos_update.cc',
-         'chromeos_update_engine.cc',
-         'marshal.glibmarshal.c',
-         'version_check.cc',
-]
+SOURCES = Split('''\
+  chromeos_brightness.cc
+  chromeos_cryptohome.cc
+  chromeos_imageburn.cc
+  chromeos_input_method.cc
+  chromeos_input_method_ui.cc
+  chromeos_keyboard.cc
+  chromeos_login.cc
+  chromeos_login_helpers.cc
+  chromeos_mount.cc
+  chromeos_network.cc
+  chromeos_power.cc
+  chromeos_screen_lock.cc
+  chromeos_speech_synthesis.cc
+  chromeos_synaptics.cc
+  chromeos_syslogs.cc
+  chromeos_system.cc
+  chromeos_touchpad.cc
+  chromeos_update.cc
+  chromeos_update_engine.cc
+  marshal.glibmarshal.c
+  version_check.cc
+''')
 
 env = base_env.Clone()
 env.Append(LIBS=['base', 'chromeos', 'rt'])