Attempt 3: Makes managed mode constrain the height of windows so they don't

ash/wm/toplevel_window_event_filter.h

Index: ash/wm/toplevel_window_event_filter.h
diff --git a/ash/wm/toplevel_window_event_filter.h b/ash/wm/toplevel_window_event_filter.h
index f6899de9faab7783c8265bd63553472119588bf2..01bced71d2d3a364a5557068c22dfbb868eaeb5c 100644
--- a/ash/wm/toplevel_window_event_filter.h
+++ b/ash/wm/toplevel_window_event_filter.h
@@ -54,6 +54,12 @@ class ASH_EXPORT ToplevelWindowEventFilter :
   virtual void RunMoveLoop(aura::Window* source) OVERRIDE;
   virtual void EndMoveLoop() OVERRIDE;
 
+ protected:
+  // Creates a new WindowResizer.
+  virtual WindowResizer* CreateWindowResizer(aura::Window* window,
+                                             const gfx::Point& point,
+                                             int window_component);
+
  private:
   // Invoked when the mouse is released to cleanup after a drag.
   void CompleteDrag(aura::Window* window);