Articulate the cancel behavior in the WebTouchEvent.

content/common/input/web_input_event_traits_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.
 
 #include "content/common/input/web_input_event_traits.h"
 
 #include <limits>
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
@@ skipping 106 matching lines @@
   touch0 = touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
   touch0.touches[0] = CreateTouchPoint(WebTouchPoint::StateMoved, 1);
   touch1.touches[1] = CreateTouchPoint(WebTouchPoint::StateStationary, 1);
   touch0.touches[1] = CreateTouchPoint(WebTouchPoint::StateStationary, 0);
   touch1.touches[0] = CreateTouchPoint(WebTouchPoint::StateMoved, 0);
   WebInputEventTraits::Coalesce(touch0, &touch1);
   ASSERT_EQ(1, touch1.touches[0].id);
   ASSERT_EQ(0, touch1.touches[1].id);
   EXPECT_EQ(WebTouchPoint::StateMoved, touch1.touches[0].state);
   EXPECT_EQ(WebTouchPoint::StateMoved, touch1.touches[1].state);
+
+  // Touch moves with different dispatchTypes coalesce.
+  touch0 = CreateTouch(WebInputEvent::TouchMove, 2);
+  touch0.dispatchType = WebInputEvent::DispatchType::Blocking;
+  touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
+  touch1.dispatchType = WebInputEvent::DispatchType::EventNonBlocking;
+  touch0.touches[0] = touch1.touches[1] =
+      CreateTouchPoint(WebTouchPoint::StateMoved, 1);
+  touch0.touches[1] = touch1.touches[0] =
+      CreateTouchPoint(WebTouchPoint::StateMoved, 0);
+  EXPECT_TRUE(WebInputEventTraits::CanCoalesce(touch0, touch1));
+  WebInputEventTraits::Coalesce(touch0, &touch1);
+  ASSERT_EQ(WebInputEvent::DispatchType::Blocking, touch1.dispatchType);
+
+  touch0 = CreateTouch(WebInputEvent::TouchMove, 2);
+  touch0.dispatchType =
+      WebInputEvent::DispatchType::ListenersForcedNonBlockingPassive;
+  touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
+  touch1.dispatchType =
+      WebInputEvent::DispatchType::ListenersNonBlockingPassive;
+  touch0.touches[0] = touch1.touches[1] =
+      CreateTouchPoint(WebTouchPoint::StateMoved, 1);
+  touch0.touches[1] = touch1.touches[0] =
+      CreateTouchPoint(WebTouchPoint::StateMoved, 0);
+  EXPECT_TRUE(WebInputEventTraits::CanCoalesce(touch0, touch1));
+  WebInputEventTraits::Coalesce(touch0, &touch1);
+  ASSERT_EQ(WebInputEvent::DispatchType::ListenersNonBlockingPassive,
+            touch1.dispatchType);
 }
 
 TEST_F(WebInputEventTraitsTest, PinchEventCoalescing) {
   WebGestureEvent pinch0 =
       CreateGesture(WebInputEvent::GesturePinchBegin, 1, 1);
   WebGestureEvent pinch1 =
       CreateGesture(WebInputEvent::GesturePinchUpdate, 2, 2);
 
   // Only GesturePinchUpdate's coalesce.
   EXPECT_FALSE(WebInputEventTraits::CanCoalesce(pinch0, pinch0));
@@ skipping 90 matching lines @@
   WebGestureEvent gesture =
       CreateGesture(WebInputEvent::GesturePinchBegin, 1, 1);
   EXPECT_FALSE(WebInputEventTraits::ToString(gesture).empty());
 
   WebTouchEvent touch = CreateTouch(WebInputEvent::TouchStart);
   EXPECT_FALSE(WebInputEventTraits::ToString(touch).empty());
 }
 
 }  // namespace
 }  // namespace content