Created min size for print preview dialog and modified to allow the

ui/aura/window_targeter.h

 // Copyright (c) 2013 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 UI_AURA_WINDOW_TARGETER_H_
 #define UI_AURA_WINDOW_TARGETER_H_
 
 #include "base/macros.h"
 #include "ui/aura/aura_export.h"
 #include "ui/events/event_targeter.h"
 
 namespace ui {
 class KeyEvent;
 class LocatedEvent;
 }  // namespace ui
 
+namespace gfx {
+class Point;
+}  // namespace gfx
+
 namespace aura {

[Lei Zhang, 2016/08/18 20:30:57]

nit: leave a blank line after the namespace like before, ditto elsewhere.

[rbpotter, 2016/08/19 01:59:09]

Done.

+// Key for native window property that indicates if the window should have
+// bounds independent of its modal parent. Only supported on ChromeOS.
+AURA_EXPORT extern const char kHasIndependentBoundsKey[];
 
 class Window;
 
 class AURA_EXPORT WindowTargeter : public ui::EventTargeter {
  public:
   WindowTargeter();
   ~WindowTargeter() override;
 
   // Returns true if |window| or one of its descendants can be a target of
   // |event|. This requires that |window| and its descendants are not
@@ skipping 25 matching lines @@
   // parent's coordinate system.
   virtual bool EventLocationInsideBounds(Window* target,
                                          const ui::LocatedEvent& event) const;
 
   // ui::EventTargeter:
   ui::EventTarget* FindTargetForEvent(ui::EventTarget* root,
                                       ui::Event* event) override;
   ui::EventTarget* FindNextBestTarget(ui::EventTarget* previous_target,
                                       ui::Event* event) override;
 
+  // Returns true if |child|'s bounds extend outside of |parent|'s bounds.
+  bool ChildHasBoundsOutsideParent(Window* parent, Window* child);

[Lei Zhang, 2016/08/18 20:30:57]

static method since it doesn't depend on |this| at all?

[rbpotter, 2016/08/19 01:59:09]

Done.

+
+  // Returns whether the location of the event is in an actionable region of

[Lei Zhang, 2016/08/18 20:30:58]

s/the location of the event/|point|/

[rbpotter, 2016/08/19 01:59:10]

Done.

+  // |window| or of any of its children. Does not assume that children are
+  // restricted to the bounds of their modal parent windows if the
+  // kHasIndependentBounds property is set. If in_parent_coordinates is true

[Lei Zhang, 2016/08/18 20:30:57]

nit: refer to variables as |var|

[rbpotter, 2016/08/19 01:59:09]

Done.

+  // |point| is in |window|'s parent's coordinate system, if false |point| is
+  // in |window|'s coordinate system.
+  bool HasIndependentChildWithEvent(Window* window,
+                                    gfx::Point point,

[Lei Zhang, 2016/08/18 20:30:57]

Pass by const-ref

[rbpotter, 2016/08/19 01:59:10]

Done.

+                                    bool in_parent_coordinates);
+
  private:
   Window* FindTargetForKeyEvent(Window* root_window, const ui::KeyEvent& event);
   Window* FindTargetForNonKeyEvent(Window* root_window, ui::Event* event);
   Window* FindTargetInRootWindow(Window* root_window,
                                  const ui::LocatedEvent& event);
   Window* FindTargetForLocatedEventRecursively(Window* root_window,
                                                ui::LocatedEvent* event);
 
   DISALLOW_COPY_AND_ASSIGN(WindowTargeter);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_TARGETER_H_