Reset the default value of touch event flag back to "Auto".

chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc

Index: chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc
diff --git a/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc b/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc
index 771856086a9782b523294ff2af6ed0b1c0aaf5f8..1d6edf3baade91ef3bb7209b666f503af53d7795 100644
--- a/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc
+++ b/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc
@@ -258,15 +258,19 @@ void RecordTouchEventState() {
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
   const std::string touch_enabled_switch =
-      command_line.HasSwitch(switches::kTouchEvents) ?
-      command_line.GetSwitchValueASCII(switches::kTouchEvents) :
-      switches::kTouchEventsEnabled;
+      command_line.HasSwitch(switches::kTouchEvents)
+          ? command_line.GetSwitchValueASCII(switches::kTouchEvents)
+          : switches::kTouchEventsAuto;
 
   UMATouchEventsState state;
   if (touch_enabled_switch.empty() ||
-      touch_enabled_switch == switches::kTouchEventsEnabled ||
-      touch_enabled_switch == switches::kTouchEventsAuto) {
+      touch_enabled_switch == switches::kTouchEventsEnabled) {
     state = UMA_TOUCH_EVENTS_ENABLED;
+  } else if (touch_enabled_switch == switches::kTouchEventsAuto) {
+    state = (ui::GetTouchScreensAvailability() ==
+             ui::TouchScreensAvailability::ENABLED)
+                ? UMA_TOUCH_EVENTS_AUTO_ENABLED
+                : UMA_TOUCH_EVENTS_AUTO_DISABLED;
   } else if (touch_enabled_switch == switches::kTouchEventsDisabled) {
     state = UMA_TOUCH_EVENTS_DISABLED;
   } else {