Gestures are now possible using touch events with any ids

ui/aura/window_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 "ui/aura/window.h"
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/stringprintf.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 500 matching lines @@
 
   window->ReleaseCapture();
   EXPECT_FALSE(window->HasCapture());
   EXPECT_EQ(1, delegate.capture_lost_count());
   EXPECT_EQ(1, delegate.capture_changed_event_count());
   EXPECT_EQ(1, delegate.mouse_event_count());
 
   generator.PressLeftButton();
   EXPECT_EQ(1, delegate.mouse_event_count());
 
-  root_window()->DispatchTouchEvent(&touchev);
+  TouchEvent touchev2(ui::ET_TOUCH_PRESSED, gfx::Point(50, 50), 1);
+  root_window()->DispatchTouchEvent(&touchev2);
   EXPECT_EQ(0, delegate.touch_event_count());
 
   // Removing the capture window from parent should reset the capture window
   // in the root window.
   window->SetCapture();
   EXPECT_EQ(window.get(), root_window()->capture_window());
   window->parent()->RemoveChild(window.get());
   EXPECT_FALSE(window->HasCapture());
   EXPECT_EQ(NULL, root_window()->capture_window());
 }
@@ skipping 1189 matching lines @@
 
   w1.reset();  // Deletes w11 and w111.
   w11 = NULL;
   w111 = NULL;
   EXPECT_EQ(2, observer.added_count());
   EXPECT_EQ(2, observer.removed_count());
 }
 
 }  // namespace test
 }  // namespace aura