Fix type truncation warnings in HID code.

GetShortData() and IOHIDElementGetUsage() both return uint32s, so raise the size
of various containing types to uint32.

I tried to look in the USB HID spec to see if any of the affected fields here
were limited to e.g. <2^16, meaning that it'd be safe to just cast down to the
existing uint16s instead, but I couldn't find any limits.

BUG=81439
TEST=none

Review URL: https://codereview.chromium.org/656583003

Cr-Commit-Position: refs/heads/master@{#300201}

1 files changed, 5 insertions, 2 deletions

diff --git a/device/hid/hid_service_mac.cc b/device/hid/hid_service_mac.cc
index 4723668..6e091a85 100644
--- a/device/hid/hid_service_mac.cc
+++ b/device/hid/hid_service_mac.cc
@@ -106,8 +106,11 @@ void GetCollectionInfos(IOHIDDeviceRef device,
       HidCollectionInfo collection_info;
       HidUsageAndPage::Page page = static_cast<HidUsageAndPage::Page>(
           IOHIDElementGetUsagePage(collection));
-      uint16_t usage = IOHIDElementGetUsage(collection);
-      collection_info.usage = HidUsageAndPage(usage, page);
+      uint32_t usage = IOHIDElementGetUsage(collection);
+      if (usage > std::numeric_limits<uint16_t>::max())
+        continue;
+      collection_info.usage =
+          HidUsageAndPage(static_cast<uint16_t>(usage), page);
       // Explore children recursively and retrieve their report IDs
       GetReportIds(collection, &collection_info.report_ids);
       if (collection_info.report_ids.size() > 0) {