Set the unique_event_id when converting from TouchEvent to WebTouchEvent

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 95 matching lines @@
 
   EXPECT_EQ(ids[0], event.GetPointerId(0));
   EXPECT_EQ(ids[2], event.GetPointerId(1));
 
   // Test cloning of pointer count and id information.
   // TODO(mustaq): Make a separate clone test, crbug.com/450655
   scoped_ptr<MotionEvent> clone = event.Clone();
   EXPECT_EQ(2U, clone->GetPointerCount());
   EXPECT_EQ(ids[0], clone->GetPointerId(0));
   EXPECT_EQ(ids[2], clone->GetPointerId(1));
+  EXPECT_EQ(event.GetUniqueEventId(), clone->GetUniqueEventId());
   EXPECT_EQ(test::ToString(event), test::ToString(*clone));
 
   TouchEvent release0 = TouchWithType(ET_TOUCH_RELEASED, ids[0]);
   EXPECT_TRUE(event.OnTouch(release0));
   event.CleanupRemovedTouchPoints(release0);
   EXPECT_EQ(1U, event.GetPointerCount());
 
   EXPECT_EQ(ids[2], event.GetPointerId(0));
 
   TouchEvent release2 = TouchWithType(ET_TOUCH_RELEASED, ids[2]);
@@ skipping 74 matching lines @@
   EXPECT_TRUE(event.OnTouch(press1));
 
   EXPECT_EQ(2U, event.GetPointerCount());
   EXPECT_FLOAT_EQ(x, event.GetX(1));
   EXPECT_FLOAT_EQ(y, event.GetY(1));
   EXPECT_FLOAT_EQ(raw_x, event.GetRawX(1));
   EXPECT_FLOAT_EQ(raw_y, event.GetRawY(1));
 
   // Test cloning of pointer location information.
   scoped_ptr<MotionEvent> clone = event.Clone();
+  EXPECT_EQ(event.GetUniqueEventId(), clone->GetUniqueEventId());
   EXPECT_EQ(test::ToString(event), test::ToString(*clone));
   EXPECT_EQ(2U, clone->GetPointerCount());
   EXPECT_FLOAT_EQ(x, clone->GetX(1));
   EXPECT_FLOAT_EQ(y, clone->GetY(1));
   EXPECT_FLOAT_EQ(raw_x, clone->GetRawX(1));
   EXPECT_FLOAT_EQ(raw_y, clone->GetRawY(1));
 
   x = 27.9f;
   y = 22.3f;
   raw_x = x + kRawOffsetX;
@@ skipping 58 matching lines @@
 
   EXPECT_EQ(2U, event.GetPointerCount());
   EXPECT_FLOAT_EQ(radius_y, event.GetTouchMajor(1) / 2);
   EXPECT_FLOAT_EQ(radius_x, event.GetTouchMinor(1) / 2);
   EXPECT_FLOAT_EQ(rotation_angle, event.GetOrientation(1) * 180 / M_PI);
   EXPECT_FLOAT_EQ(pressure, event.GetPressure(1));
 
   // Test cloning of tap params
   // TODO(mustaq): Make a separate clone test, crbug.com/450655
   scoped_ptr<MotionEvent> clone = event.Clone();
+  EXPECT_EQ(event.GetUniqueEventId(), clone->GetUniqueEventId());
   EXPECT_EQ(test::ToString(event), test::ToString(*clone));
   EXPECT_EQ(2U, clone->GetPointerCount());
   EXPECT_FLOAT_EQ(radius_y, clone->GetTouchMajor(1) / 2);
   EXPECT_FLOAT_EQ(radius_x, clone->GetTouchMinor(1) / 2);
   EXPECT_FLOAT_EQ(rotation_angle, clone->GetOrientation(1) * 180 / M_PI);
   EXPECT_FLOAT_EQ(pressure, clone->GetPressure(1));
 
   // TODO(mustaq): The move test seems out-of-scope here, crbug.com/450655
   radius_x = 76.98f;
   radius_y = 321.54f;
@@ skipping 185 matching lines @@
   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));
 }
 
+// Test after converting touch events into motion events, motion events should
+// have the same unique_event_id as touch events.
+TEST(MotionEventAuraTest, UniqueEventID) {
+  MotionEventAura event;
+
+  TouchEvent press0 = TouchWithType(ET_TOUCH_PRESSED, 3);
+  EXPECT_TRUE(event.OnTouch(press0));
+  EXPECT_EQ(MotionEvent::ACTION_DOWN, event.GetAction());
+  ASSERT_EQ(1U, event.GetPointerCount());
+  EXPECT_EQ(event.GetUniqueEventId(), press0.unique_event_id());
+
+  TouchEvent press1 = TouchWithType(ET_TOUCH_PRESSED, 6);
+  EXPECT_TRUE(event.OnTouch(press1));
+  EXPECT_EQ(MotionEvent::ACTION_POINTER_DOWN, event.GetAction());
+  EXPECT_EQ(2U, event.GetPointerCount());
+  EXPECT_EQ(event.GetUniqueEventId(), press1.unique_event_id());
+}
+
 }  // namespace ui