Expand event timestamp validation check to more platforms

ui/events/event_utils.cc

 // Copyright (c) 2012 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 "ui/events/event_utils.h"
 
 #include <vector>
 
 #include "base/metrics/histogram.h"
 #include "ui/display/display.h"
@@ skipping 44 matching lines @@
       break;
   }
   return event;
 }
 
 int RegisterCustomEventType() {
   return ++g_custom_event_types;
 }
 
 void ValidateEventTimeClock(base::TimeTicks* timestamp) {
-// Restrict this validation to DCHECK builds except when using X11 which is
-// known to provide bogus timestamps that require correction (crbug.com/611950).
-#if defined(USE_X11) || DCHECK_IS_ON()
   if (base::debug::BeingDebugged())
     return;
 
   base::TimeTicks now = EventTimeForNow();
   int64_t delta = (now - *timestamp).InMilliseconds();
-  if (delta < 0 || delta > 60 * 1000) {
-    UMA_HISTOGRAM_BOOLEAN("Event.TimestampHasValidTimebase", false);
+  bool has_valid_timebase = delta >= 0 && delta <= 60 * 1000;
+  UMA_HISTOGRAM_BOOLEAN("Event.TimestampHasValidTimebase.Browser",
+                        has_valid_timebase);
+
 #if defined(USE_X11)
+  // Restrict this correction to X11 which is known to provide bogus timestamps
+  // that require correction (crbug.com/611950).
+  if (!has_valid_timebase)
     *timestamp = now;
-#else
-    NOTREACHED() << "Unexpected event timestamp, now:" << now
-                 << " event timestamp:" << *timestamp;
-#endif
-  }
-
-  UMA_HISTOGRAM_BOOLEAN("Event.TimestampHasValidTimebase", true);
 #endif
 }
 
 bool ShouldDefaultToNaturalScroll() {
   return GetInternalDisplayTouchSupport() ==
          display::Display::TOUCH_SUPPORT_AVAILABLE;
 }
 
 display::Display::TouchSupport GetInternalDisplayTouchSupport() {
   display::Screen* screen = display::Screen::GetScreen();
@@ skipping 31 matching lines @@
     case ET_TOUCH_RELEASED:
       UMA_HISTOGRAM_CUSTOM_COUNTS("Event.Latency.OS.TOUCH_RELEASED",
                                   delta.InMicroseconds(), 1, 1000000, 50);
       return;
     default:
       return;
   }
 }
 
 }  // namespace ui