Changes MouseEvent constructor to take changed_button_flags.

ash/extended_desktop_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/display/display_controller.h"
 #include "ash/display/display_manager.h"
 #include "ash/root_window_controller.h"
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 423 matching lines @@
   generator2.MoveMouseTo(-985, 15);
   EXPECT_EQ("0 1 0", r1_d1.GetMouseMotionCountsAndReset());
 
   r1_w2->SetCapture();
   EXPECT_EQ(r1_w2.get(),
             aura::client::GetCaptureWindow(r2_w1->GetRootWindow()));
   generator2.MoveMouseBy(10, 10);
   generator2.ClickLeftButton();
   EXPECT_EQ("0 0 0", r2_d1.GetMouseMotionCountsAndReset());
   EXPECT_EQ("0 0", r2_d1.GetMouseButtonCountsAndReset());
-  // mouse is already entered.
-  EXPECT_EQ("0 1 0", r1_d2.GetMouseMotionCountsAndReset());
+  EXPECT_EQ("1 1 0", r1_d2.GetMouseMotionCountsAndReset());
   EXPECT_EQ("1 1", r1_d2.GetMouseButtonCountsAndReset());
   r1_w2->ReleaseCapture();
   EXPECT_EQ(NULL, aura::client::GetCaptureWindow(r2_w1->GetRootWindow()));
   generator2.MoveMouseTo(15, 15);
   generator2.ClickLeftButton();
   EXPECT_EQ("1 1 0", r2_d1.GetMouseMotionCountsAndReset());
   EXPECT_EQ("1 1", r2_d1.GetMouseButtonCountsAndReset());
   // Make sure the mouse_moved_handler_ is properly reset.
   EXPECT_EQ("0 0 0", r1_d2.GetMouseMotionCountsAndReset());
   EXPECT_EQ("0 0", r1_d2.GetMouseButtonCountsAndReset());
@@ skipping 382 matching lines @@
   generator.ReleaseLeftButton();
   EXPECT_EQ("-999,-999 -999,-999", event_handler.GetLocationsAndReset());
 
   generator.MoveMouseTo(400, 150);
   EXPECT_EQ("100,150 100,150", event_handler.GetLocationsAndReset());
 
   ash::Shell::GetInstance()->RemovePreTargetHandler(&event_handler);
 }
 
 }  // namespace ash