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

ash/wm/window_resizer.h

Index: ash/wm/window_resizer.h
diff --git a/ash/wm/window_resizer.h b/ash/wm/window_resizer.h
index f44081b07270d08c9a869942045cedd83de7f683..777eff3a897e7c2c0323bc9b1b68fde24d3a7dbf 100644
--- a/ash/wm/window_resizer.h
+++ b/ash/wm/window_resizer.h
@@ -38,7 +38,7 @@ class ASH_EXPORT WindowResizer {
                 const gfx::Point& location,
                 int window_component,
                 int grid_size);
-  ~WindowResizer();
+  virtual ~WindowResizer();
 
   // Returns a bitmask of the kBoundsChange_ values.
   static int GetBoundsChangeForWindowComponent(int component);
@@ -64,12 +64,20 @@ class ASH_EXPORT WindowResizer {
   }
   int window_component() const { return window_component_; }
   aura::Window* window() const { return window_; }
+  int grid_size() const { return grid_size_; }
+  bool did_move_or_resize() const { return did_move_or_resize_; }
+  int bounds_change() const { return bounds_change_; }
 
- private:
+ protected:
   // Returns the bounds to give to the window once the mouse has moved to
   // |location|.
-  gfx::Rect GetBoundsForDrag(const gfx::Point& location);
+  virtual gfx::Rect GetBoundsForDrag(const gfx::Point& location);
+
+  // Returns the final bounds. This differs from current bounds if a grid_size
+  // was specified.
+  virtual gfx::Rect GetFinalBounds();
 
+ private:
   // Returns the new origin of the window. The arguments are the difference
   // between the current location and the initial location.
   gfx::Point GetOriginForDrag(int delta_x, int delta_y) const;