[M-37]: Fix dragging tab via mouse when touch is down on ChromeOS

ash/wm/toplevel_window_event_handler_unittest.cc

 // Copyright (c) 2012 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/wm/toplevel_window_event_handler.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/lock_state_controller.h"
 #include "ash/wm/resize_shadow.h"
 #include "ash/wm/resize_shadow_controller.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_util.h"
 #include "ash/wm/workspace_controller.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/message_loop/message_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/test/aura_test_base.h"
 #include "ui/aura/test/event_generator.h"
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/hit_test.h"
 #include "ui/events/event.h"
 #include "ui/gfx/screen.h"
 #include "ui/wm/core/window_util.h"
@@ skipping 669 matching lines @@
   aura::client::WindowMoveClient* move_client =
       aura::client::GetWindowMoveClient(window2->GetRootWindow());
   EXPECT_EQ(aura::client::MOVE_CANCELED,
             move_client->RunMoveLoop(window2.get(), gfx::Vector2d(),
                 aura::client::WINDOW_MOVE_SOURCE_MOUSE));
 
   generator.ReleaseLeftButton();
   EXPECT_EQ("10,11 100x100", window1->bounds().ToString());
 }
 
+namespace {
+
+void SendMouseReleaseAndReleaseCapture(aura::test::EventGenerator* generator,
+                                       aura::Window* window) {
+  generator->ReleaseLeftButton();
+  window->ReleaseCapture();
+}
+
+}  // namespace
+
+// Test that a drag is successful even if ET_MOUSE_CAPTURE_CHANGED is sent
+// immediately after the mouse release. views::Widget has this behavior.
+TEST_F(ToplevelWindowEventHandlerTest, CaptureLossAfterMouseRelease) {
+  scoped_ptr<aura::Window> window(CreateWindow(HTNOWHERE));
+  aura::test::EventGenerator generator(Shell::GetPrimaryRootWindow(),
+                                       window.get());
+  generator.PressLeftButton();
+  window->SetCapture();
+
+  aura::client::WindowMoveClient* move_client =
+      aura::client::GetWindowMoveClient(window->GetRootWindow());
+  base::MessageLoopForUI::current()->PostTask(
+      FROM_HERE,
+      base::Bind(&SendMouseReleaseAndReleaseCapture,
+                 base::Unretained(&generator),
+                 base::Unretained(window.get())));
+  EXPECT_EQ(aura::client::MOVE_SUCCESSFUL,
+            move_client->RunMoveLoop(window.get(), gfx::Vector2d(),
+                aura::client::WINDOW_MOVE_SOURCE_MOUSE));
+}
+
 // Showing the resize shadows when the mouse is over the window edges is tested
 // in resize_shadow_and_cursor_test.cc
 
 }  // namespace test
 }  // namespace ash