Remove Mac SDK dependency

Chromium compiles with the 10.14 SDK, so remove old code that handled
the case where it compiled with previous SDKs.

Also update property accesses to use property syntax.

Bug: 1044838
Change-Id: Ib7f2e5cd2cfc436dd815e5861d0448262f43955c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2021024
Auto-Submit: Avi Drissman <avi@chromium.org>
Commit-Queue: Brandon Jones <bajones@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737896}

device/gamepad/game_controller_data_fetcher_mac.mm

@@ -4,6 +4,7 @@
 
 #include "device/gamepad/game_controller_data_fetcher_mac.h"
 
+#import <GameController/GameController.h>
 #include <string.h>
 
 #include "base/mac/mac_util.h"
@@ -12,8 +13,6 @@
 #include "base/strings/utf_string_conversions.h"
 #include "device/gamepad/gamepad_standard_mappings.h"
 
-#import <GameController/GameController.h>
-
 namespace device {
 
 namespace {
@@ -81,7 +80,7 @@ void GameControllerDataFetcherMac::GetGamepadData(bool) {
     if (!IsSupported(controller))
       continue;
 
-    int player_index = [controller playerIndex];
+    int player_index = controller.playerIndex;
     if (player_index != GCControllerPlayerIndexUnset)
       player_indices[player_index] = true;
   }
@@ -97,7 +96,7 @@ void GameControllerDataFetcherMac::GetGamepadData(bool) {
     if (!IsSupported(controller))
       continue;
 
-    int player_index = [controller playerIndex];
+    int player_index = controller.playerIndex;
     if (player_index == GCControllerPlayerIndexUnset) {
       player_index = NextUnusedPlayerIndex();
       if (player_index == GCControllerPlayerIndexUnset)
@@ -127,16 +126,8 @@ void GameControllerDataFetcherMac::GetGamepadData(bool) {
       pad.connected = true;
       connected_[player_index] = true;
 
-// In OS X 10.11, the type of the GCController playerIndex member was
-// changed from NSInteger to a GCControllerPlayerIndex enum. Once Chrome
-// no longer supports OSX 10.10, the integer version can be removed.
-#if !defined(MAC_OS_X_VERSION_10_11) || \
-    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_11
-      [controller setPlayerIndex:player_index];
-#else
-      [controller
-          setPlayerIndex:static_cast<GCControllerPlayerIndex>(player_index)];
-#endif
+      controller.playerIndex =
+          static_cast<GCControllerPlayerIndex>(player_index);
     }
 
     pad.timestamp = CurrentTimeInMicroseconds();