Fix SD slider reading in HD

A simple typo prevented this from working.
My manual testing didn't notice because the default value
matches my desktop.

Bug: 823547
Change-Id: I9a497380c17a85437b8486e0160f6df7a1429922
Reviewed-on: https://chromium-review.googlesource.com/1103231
Commit-Queue: Fredrik Hubinette <hubbe@chromium.org>
Reviewed-by: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567831}

ui/display/win/screen_win.cc

@@ -80,8 +80,9 @@ bool GetPathInfo(HMONITOR monitor, DISPLAYCONFIG_PATH_INFO* path_info) {
   do {
     if (GetDisplayConfigBufferSizes(
             QDC_ONLY_ACTIVE_PATHS, &num_path_array_elements,
-            &num_mode_info_array_elements) == ERROR_SUCCESS)
+            &num_mode_info_array_elements) != ERROR_SUCCESS) {
       return false;
+    }
     path_infos.resize(num_path_array_elements);
     mode_infos.resize(num_mode_info_array_elements);
     result = QueryDisplayConfig(