revert "SourceEventType added to LatencyInfo."

ui/events/event_unittest.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.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 949 matching lines @@
                      EventTimeForNow(), 11.5, 13.5, 13.0, 0.5));
   ui::TouchEvent touch_event(pointer_event);
 
   EXPECT_EQ(pointer_event.location(), touch_event.location());
   EXPECT_EQ(pointer_event.flags(), touch_event.flags());
   EXPECT_EQ(pointer_event.pointer_id(), touch_event.touch_id());
   EXPECT_EQ(pointer_event.pointer_details(), touch_event.pointer_details());
   EXPECT_EQ(pointer_event.time_stamp(), touch_event.time_stamp());
 }
 
-TEST(EventTest, PointerEventSourceEventTypeExistsInLatencyInfo) {
-  ui::PointerEvent wheel_poniter_event(
-      ui::ET_POINTER_WHEEL_CHANGED, gfx::Point(), gfx::Point(), 0, 0, 0,
-      ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_MOUSE),
-      ui::EventTimeForNow());
-  EXPECT_EQ(wheel_poniter_event.latency()->source_event_type(),
-            ui::SourceEventType::WHEEL);
-
-  ui::PointerEvent touch_poniter_event(
-      ui::ET_TOUCH_PRESSED, gfx::Point(), gfx::Point(), 0, 0, 0,
-      ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH),
-      ui::EventTimeForNow());
-  EXPECT_EQ(touch_poniter_event.latency()->source_event_type(),
-            ui::SourceEventType::TOUCH);
-}
-
 // Checks that Event.Latency.OS.TOUCH_PRESSED, TOUCH_MOVED,
 // and TOUCH_RELEASED histograms are computed properly.
 #if defined(USE_X11)
 TEST(EventTest, EventLatencyOSTouchHistograms) {
   base::HistogramTester histogram_tester;
   ScopedXI2Event scoped_xevent;
 
   // SetUp for test
   DeviceDataManagerX11::CreateInstance();
   std::vector<int> devices;
@@ skipping 33 matching lines @@
   XButtonEvent* button_event = &(native_event.xbutton);
   button_event->type = ButtonPress;
   button_event->button = 4; // A valid wheel button number between min and max.
   MouseWheelEvent mouse_ev(&native_event);
 
   histogram_tester.ExpectTotalCount("Event.Latency.OS.MOUSE_WHEEL", 1);
 #endif
 }
 
 }  // namespace ui