Reland of [sensors] Ambient light sensor implementation for ChromeOS and Linux.

device/BUILD.gn

 # Copyright 2015 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.
 
 import("//build/config/features.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")  # For generate_jni().
 }
@@ skipping 79 matching lines @@
     "//testing/gtest",
     "//tools/usb_gadget",
     "//url",
   ]
 
   if (is_linux && !is_chromeos && use_dbus) {
     sources += [ "battery/battery_status_manager_linux_unittest.cc" ]
     deps += [ "//dbus:test_support" ]
   }
 
+  if (is_linux) {
+    sources += [ "generic_sensor/linux/sensor_reader_unittest.cc" ]
+  }
+
   # HID and Serial:
   # Android doesn't compile.
   # Linux, requires udev.
   if (!is_linux_without_udev && !is_android) {
     sources += [
       "hid/hid_connection_unittest.cc",
       "hid/hid_device_filter_unittest.cc",
       "hid/hid_report_descriptor_unittest.cc",
       "hid/input_service_linux_unittest.cc",
       "hid/test_report_descriptors.cc",
@@ skipping 165 matching lines @@
     ]
     srcjar_deps = [ "//device/gamepad:java_enums_srcjar" ]
   }
 
   java_cpp_enum("bluetooth_test_javagen") {
     sources = [
       "bluetooth/test/bluetooth_test.h",
     ]
   }
 }