Enables docked windows by default

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"
@@ skipping 387 matching lines @@
     generator.GestureScrollSequence(location, end,
         base::TimeDelta::FromMilliseconds(5),
         10);
     RunAllPendingInMessageLoop();
 
     // Verify that the window has moved after the gesture.
     EXPECT_NE(old_bounds.ToString(), target->bounds().ToString());
     EXPECT_EQ(snapped_bounds.ToString(), target->bounds().ToString());
   }
 
+  // Resetting the bounds avoids a situation when the initial drag before
+  // the fling results in target getting stuck at the edge and fling
+  // incrementing the snapping sequence against our assumptions.
+  target->SetBounds(gfx::Rect(700, 0, 100, 100));
   old_bounds = target->bounds();
 
   // Snap left.
   {
     // Get the expected snapped bounds before snapping.
     internal::SnapSizer sizer(window_state, location,
         internal::SnapSizer::LEFT_EDGE,
         internal::SnapSizer::OTHER_INPUT);
     gfx::Rect snapped_bounds = sizer.GetSnapBounds(target->bounds());
     end = location = target->GetBoundsInRootWindow().CenterPoint();
@@ skipping 267 matching lines @@
     RunAllPendingInMessageLoop();
     EXPECT_EQ("10,11 100x100", target->bounds().ToString());
   }
 }
 
 // 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