gamepad: use range-based loop

Change-Id: I0f8b76df62afb0b3f00f66806d1dff146117cc89
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2108450
Commit-Queue: Johann Koenig <johannkoenig@google.com>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#752757}

third_party/blink/renderer/modules/gamepad/gamepad_shared_memory_reader.cc

@@ -123,8 +123,9 @@ void GamepadSharedMemoryReader::SampleGamepads(device::Gamepads* gamepads) {
     // gamepads to prevent fingerprinting. The actual data is not cleared.
     // WebKit will only copy out data into the JS buffers for connected
     // gamepads so this is sufficient.
-    for (size_t i = 0; i < device::Gamepads::kItemsLengthCap; i++)
-      gamepads->items[i].connected = false;
+    for (auto& item : gamepads->items) {
+      item.connected = false;
+    }
   }
 }