[Android] Always insert a TouchCancel if window or tab focus is lost

ui/events/gesture_detection/gesture_provider_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 "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/time/time.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 283 matching lines @@
   EXPECT_TRUE(gesture_provider_->OnTouchEvent(event));
   EXPECT_EQ(GESTURE_TAP_DOWN, GetMostRecentGestureEventType());
 
   Wait(GetShowPressTimeout() + kFiveMilliseconds);
   EXPECT_EQ(GESTURE_SHOW_PRESS, GetMostRecentGestureEventType());
 
   Wait(GetLongPressTimeout() + kFiveMilliseconds);
   EXPECT_EQ(GESTURE_LONG_PRESS, GetMostRecentGestureEventType());
 
   // The long press triggers window focus loss by opening a context menu
-  gesture_provider_->CancelActiveTouchSequence();
+  EXPECT_TRUE(gesture_provider_->CancelActiveTouchSequence());
   EXPECT_EQ(GESTURE_TAP_CANCEL, GetMostRecentGestureEventType());
 }
 
 TEST_F(GestureProviderTest, TapCancelledWhenScrollBegins) {
   base::TimeTicks event_time = base::TimeTicks::Now();
 
   MockMotionEvent event =
       ObtainMotionEvent(event_time, MotionEvent::ACTION_DOWN);
 
   EXPECT_TRUE(gesture_provider_->OnTouchEvent(event));
@@ skipping 648 matching lines @@
 
   MockMotionEvent event =
       ObtainMotionEvent(event_time, MotionEvent::ACTION_DOWN);
   EXPECT_TRUE(gesture_provider_->OnTouchEvent(event));
 
   const base::TimeDelta long_press_timeout =
       GetLongPressTimeout() + GetShowPressTimeout() + kFiveMilliseconds * 2;
   Wait(long_press_timeout);
   EXPECT_EQ(GESTURE_LONG_PRESS, GetMostRecentGestureEventType());
 
-  gesture_provider_->CancelActiveTouchSequence();
+  EXPECT_TRUE(gesture_provider_->CancelActiveTouchSequence());
   EXPECT_EQ(GESTURE_TAP_CANCEL, GetMostRecentGestureEventType());
 
   event = ObtainMotionEvent(event_time + long_press_timeout,
                             MotionEvent::ACTION_UP);
   gesture_provider_->OnTouchEvent(event);
   EXPECT_FALSE(HasReceivedGesture(GESTURE_LONG_TAP));
 }
 
 // Verify that ignoring the remaining touch sequence triggers proper touch and
 // gesture cancellation.
 TEST_F(GestureProviderTest, CancelActiveTouchSequence) {
   base::TimeTicks event_time = base::TimeTicks::Now();
 
-  gesture_provider_->CancelActiveTouchSequence();
+  EXPECT_FALSE(gesture_provider_->CancelActiveTouchSequence());
   EXPECT_EQ(0U, GetReceivedGestureCount());
 
   MockMotionEvent event =
       ObtainMotionEvent(event_time, MotionEvent::ACTION_DOWN);
   EXPECT_TRUE(gesture_provider_->OnTouchEvent(event));
   EXPECT_EQ(GESTURE_TAP_DOWN, GetMostRecentGestureEventType());
 
-  gesture_provider_->CancelActiveTouchSequence();
+  ASSERT_TRUE(gesture_provider_->CancelActiveTouchSequence());
   EXPECT_EQ(GESTURE_TAP_CANCEL, GetMostRecentGestureEventType());
 
   // Subsequent MotionEvent's are dropped until ACTION_DOWN.
   event = ObtainMotionEvent(event_time + kFiveMilliseconds,
                             MotionEvent::ACTION_MOVE);
   EXPECT_FALSE(gesture_provider_->OnTouchEvent(event));
 
   event = ObtainMotionEvent(event_time + kFiveMilliseconds * 2,
                             MotionEvent::ACTION_UP);
   EXPECT_FALSE(gesture_provider_->OnTouchEvent(event));
 
   event = ObtainMotionEvent(event_time + kFiveMilliseconds * 3,
                             MotionEvent::ACTION_DOWN);
   EXPECT_TRUE(gesture_provider_->OnTouchEvent(event));
   EXPECT_EQ(GESTURE_TAP_DOWN, GetMostRecentGestureEventType());
 }
 
 }  // namespace ui