Enables docked windows by default

ash/wm/workspace/workspace_window_resizer.h

 // 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.
 
 #ifndef ASH_WM_WORKSPACE_WINDOW_RESIZER_H_
 #define ASH_WM_WORKSPACE_WINDOW_RESIZER_H_
 
 #include <vector>
 
 #include "ash/wm/window_resizer.h"
@@ skipping 56 matching lines @@
   virtual void CompleteDrag(int event_flags) OVERRIDE;
   virtual void RevertDrag() OVERRIDE;
   virtual aura::Window* GetTarget() OVERRIDE;
   virtual const gfx::Point& GetInitialLocation() const OVERRIDE;
 
  private:
   WorkspaceWindowResizer(const Details& details,
                          const std::vector<aura::Window*>& attached_windows);
 
  private:
-  FRIEND_TEST_ALL_PREFIXES(WorkspaceWindowResizerTest, CancelSnapPhantom);
-  FRIEND_TEST_ALL_PREFIXES(WorkspaceWindowResizerTest, PhantomSnapMaxSize);
-  FRIEND_TEST_ALL_PREFIXES(WorkspaceWindowResizerTest, PhantomWindowShow);
+  friend class WorkspaceWindowResizerTest;
 
   // Returns the final bounds to place the window at. This differs from
   // the current when snapping.
   gfx::Rect GetFinalBounds(const gfx::Rect& bounds) const;
 
   // Lays out the attached windows. |bounds| is the bounds of the main window.
   void LayoutAttachedWindows(gfx::Rect* bounds);
 
   // Calculates the new sizes of the attached windows, given that the main
   // window has been resized (along the primary axis) by |delta|.
@@ skipping 124 matching lines @@
   // should attach.
   MatchedEdge magnetism_edge_;
 
   // Dock container window layout manager.
   DockedWindowLayoutManager* dock_layout_;
 
   // Used to determine if this has been deleted during a drag such as when a tab
   // gets dragged into another browser window.
   base::WeakPtrFactory<WorkspaceWindowResizer> weak_ptr_factory_;
 
+  // Current instance for use by the WorkspaceWindowResizerTest.
+  static WorkspaceWindowResizer* instance_;
+
   DISALLOW_COPY_AND_ASSIGN(WorkspaceWindowResizer);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_WINDOW_RESIZER_H_