Fixed the Touchscreen.TouchEventsEnabled histogram to record the correct values on X11 and Ozone ba…

chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.h

Index: chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.h
diff --git a/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.h b/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.h
index 43a0d42ba9eef1b5b8845a521225ba32ad9a72e6..79ea6d9d77f0b210fbe92225a2886c9651e9ef45 100644
--- a/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.h
+++ b/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.h
@@ -10,6 +10,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chrome_browser_main_extra_parts.h"
 #include "chrome/browser/metrics/first_web_contents_profiler.h"
+#include "ui/events/devices/input_device_event_observer.h"
 #include "ui/gfx/display_observer.h"
 
 class ChromeBrowserMainParts;
@@ -21,7 +22,8 @@ void AddMetricsExtraParts(ChromeBrowserMainParts* main_parts);
 class ChromeBrowserMainExtraPartsMetrics
     : public ChromeBrowserMainExtraParts,
       public gfx::DisplayObserver,
-      public FirstWebContentsProfiler::Delegate {
+      public FirstWebContentsProfiler::Delegate,
+      public ui::InputDeviceEventObserver {
  public:
   ChromeBrowserMainExtraPartsMetrics();
   ~ChromeBrowserMainExtraPartsMetrics() override;
@@ -46,6 +48,9 @@ class ChromeBrowserMainExtraPartsMetrics
   // FirstWebContentsProfilerDelegate overrides.
   void ProfilerFinishedCollectingMetrics() override;
 
+  // ui::InputDeviceEventObserver overrides.
+  void OnDeviceListsComplete() override;
+
   // If the number of displays has changed, emit a UMA metric.
   void EmitDisplaysChangedMetric();