Touch event flag should control only DOM event firing.

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 3800b973a166f222d7a8bf01ca346333cd0741f0..aba5fa3a0786ccc91b4a0d47682fe6f4dec09486 100644
--- a/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc
+++ b/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc
@@ -257,27 +257,12 @@ UMALinuxWindowManager GetLinuxWindowManager() {
 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::kTouchEventsAuto;
-
   UMATouchEventsState state;
-  if (touch_enabled_switch.empty() ||
-      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) {
+  if (command_line.HasSwitch(switches::kDisableTouchEventAPI)) {
     state = UMA_TOUCH_EVENTS_DISABLED;
   } else {
-    NOTREACHED();
-    return;
+    state = UMA_TOUCH_EVENTS_ENABLED;
   }
-
   UMA_HISTOGRAM_ENUMERATION("Touchscreen.TouchEventsEnabled", state,
                             UMA_TOUCH_EVENTS_STATE_COUNT);
 }