Drag and drop cleans up touch sequences from the source window.

ash/shelf/shelf_tooltip_manager_unittest.cc

 // Copyright 2013 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 "ash/shelf/shelf_tooltip_manager.h"
 
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 167 matching lines @@
   // TODO(msw): Observe events outside the shelf in mash, to close tooltips.
   aura::Window* shelf_window = shelf_->shelf_widget()->GetNativeWindow();
   bool closes = shelf_window->GetRootWindow() == Shell::GetPrimaryRootWindow();
 
   // Should hide for touches outside the shelf.
   ShowImmediately();
   ASSERT_TRUE(TooltipIsVisible());
   generator.set_current_location(gfx::Point());
   generator.PressTouch();
   EXPECT_EQ(TooltipIsVisible(), !closes);
+  generator.ReleaseTouch();
 
   // Should hide for touch events on the tooltip.
   ShowImmediately();
   ASSERT_TRUE(TooltipIsVisible());
   generator.set_current_location(GetTooltipWindow()->bounds().CenterPoint());
   generator.PressTouch();
   EXPECT_EQ(TooltipIsVisible(), !closes);
+  generator.ReleaseTouch();
 
   // Should hide for gestures outside the shelf.
   ShowImmediately();
   ASSERT_TRUE(TooltipIsVisible());
   generator.GestureTapDownAndUp(gfx::Point());
   EXPECT_EQ(TooltipIsVisible(), !closes);
 }
 
 TEST_F(ShelfTooltipManagerTest, DoNotHideForKeyEvents) {
   ui::test::EventGenerator generator(ash::Shell::GetPrimaryRootWindow());
 
   // Should not hide for key events.
   ShowImmediately();
   ASSERT_TRUE(TooltipIsVisible());
   generator.PressKey(ui::VKEY_A, ui::EF_NONE);
   EXPECT_TRUE(TooltipIsVisible());
 }
 
 }  // namespace test
 }  // namespace ash