Added support for GameController devices on OSX

device/gamepad/BUILD.gn

 # Copyright 2016 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")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")  # For generate_jni().
 }
 
 component("gamepad") {
   output_name = "device_gamepad"
 
   sources = [
     "android/gamepad_jni_registrar.cc",
     "android/gamepad_jni_registrar.h",
+    "game_controller_data_fetcher_mac.h",
+    "game_controller_data_fetcher_mac.mm",
     "gamepad_consumer.cc",
     "gamepad_consumer.h",
     "gamepad_data_fetcher.cc",
     "gamepad_data_fetcher.h",
     "gamepad_data_fetcher_manager.cc",
     "gamepad_data_fetcher_manager.h",
     "gamepad_pad_state_provider.cc",
     "gamepad_pad_state_provider.h",
     "gamepad_platform_data_fetcher.h",
     "gamepad_platform_data_fetcher_android.cc",
@@ skipping 38 matching lines @@
   }
 
   if (is_android) {
     deps += [ ":jni_headers" ]
   }
 
   if (is_mac) {
     libs = [
       "CoreFoundation.framework",
       "Foundation.framework",
+      "GameController.framework",
       "IOKit.framework",
     ]
+
+    cflags = [ "-Wpartial-availability" ]

[Nico, 2017/07/13 20:13:14]

We add this globally, at least on mac (not on ios, but I think this target isn't
pulled in on ios anyhow). Do you remember why you had to explicitly add this?
Isn't this passed twice for files in this target now?

   }
 }
 
 static_library("test_helpers") {
   testonly = true
 
   sources = [
     "gamepad_test_helpers.cc",
     "gamepad_test_helpers.h",
   ]
@@ skipping 25 matching lines @@
     ]
     srcjar_deps = [ ":java_enums_srcjar" ]
   }
 
   java_cpp_enum("java_enums_srcjar") {
     sources = [
       "gamepad_standard_mappings.h",
     ]
   }
 }