gpu_info_util: fix a DeviceInfo leak on Windows

BUG=angleproject:1874

Change-Id: I382e306ce0c27a81e0d746fb9922fa12988927d4
Reviewed-on: https://chromium-review.googlesource.com/469230
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
diff --git a/src/gpu_info_util/SystemInfo_win.cpp b/src/gpu_info_util/SystemInfo_win.cpp
index 334fae7..3073822 100644
--- a/src/gpu_info_util/SystemInfo_win.cpp
+++ b/src/gpu_info_util/SystemInfo_win.cpp
@@ -110,6 +110,8 @@
         devices->push_back(device);
     }
 
+    SetupDiDestroyDeviceInfoList(deviceInfo);
+
     return true;
 }