Touch event flag should control only DOM event firing.

chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 239 matching lines @@
       return UMA_LINUX_WINDOW_MANAGER_XMONAD;
   }
   NOTREACHED();
   return UMA_LINUX_WINDOW_MANAGER_OTHER;
 }
 #endif
 
 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);
 }
 
 #if defined(USE_OZONE) || defined(USE_X11)
 
 // Asynchronously records the touch event state when the ui::DeviceDataManager
 // completes a device scan.
 class AsynchronousTouchEventStateRecorder
     : public ui::InputDeviceEventObserver {
@@ skipping 115 matching lines @@
   }
 }
 
 namespace chrome {
 
 void AddMetricsExtraParts(ChromeBrowserMainParts* main_parts) {
   main_parts->AddParts(new ChromeBrowserMainExtraPartsMetrics());
 }
 
 }  // namespace chrome