Invalid press events don't create multiple pointers with the same id.

ui/events/gestures/motion_event_aura_unittest.cc

 // Copyright 2014 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.
 
 // MSVC++ requires this to be set before any other includes to get M_PI.
 #define _USE_MATH_DEFINES
 
 #include <cmath>
 
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 438 matching lines @@
   EXPECT_EQ(EF_CONTROL_DOWN, event.GetFlags());
 
   TouchEvent press1 = TouchWithType(ET_TOUCH_PRESSED, ids[1]);
   press1.set_flags(EF_CONTROL_DOWN | EF_CAPS_LOCK_DOWN);
   EXPECT_TRUE(event.OnTouch(press1));
   EXPECT_EQ(EF_CONTROL_DOWN | EF_CAPS_LOCK_DOWN, event.GetFlags());
 }
 
 // Once crbug.com/446852 is fixed, we should ignore redundant presses.
 TEST(MotionEventAuraTest, DoesntIgnoreRedundantPresses) {
-  int id = 7;
+  const int id = 7;
+  const int position_1 = 10;
+  const int position_2 = 23;
+
   MotionEventAura event;
-  EXPECT_TRUE(event.OnTouch(TouchWithType(ET_TOUCH_PRESSED, id)));
-  EXPECT_TRUE(event.OnTouch(TouchWithType(ET_TOUCH_PRESSED, id)));
+  TouchEvent press1 = TouchWithPosition(ET_TOUCH_PRESSED, id, position_1,
+                                        position_1, position_1, position_1);
+  EXPECT_TRUE(event.OnTouch(press1));
+  TouchEvent press2 = TouchWithPosition(ET_TOUCH_PRESSED, id, position_2,
+                                        position_2, position_2, position_2);
+  EXPECT_TRUE(event.OnTouch(press2));
+
+  EXPECT_EQ(1U, event.GetPointerCount());
+  EXPECT_FLOAT_EQ(position_2, event.GetX(0));
 }
 
 TEST(MotionEventAuraTest, IgnoresEventsWithoutPress) {
   int id = 7;
   MotionEventAura event;
   EXPECT_FALSE(event.OnTouch(TouchWithType(ET_TOUCH_MOVED, id)));
 }
 
 TEST(MotionEventAuraTest, IgnoresStationaryMoves) {
   int id = 7;
   MotionEventAura event;
   EXPECT_TRUE(event.OnTouch(TouchWithType(ET_TOUCH_PRESSED, id)));
   TouchEvent move0 = TouchWithPosition(ET_TOUCH_PRESSED, id, 10, 20, 10, 20);
   EXPECT_TRUE(event.OnTouch(move0));
 
   TouchEvent move1 = TouchWithPosition(ET_TOUCH_MOVED, id, 11, 21, 11, 21);
   EXPECT_TRUE(event.OnTouch(move1));
   EXPECT_FALSE(event.OnTouch(move1));
 }
 
 }  // namespace ui