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

ui/aura/window_targeter.h

Index: ui/aura/window_targeter.h
diff --git a/ui/aura/window_targeter.h b/ui/aura/window_targeter.h
index 048d8ad2e472aca897fccab4dfb8c125180d45ab..2716be037d892e48b516616d36d7589c69f25866 100644
--- a/ui/aura/window_targeter.h
+++ b/ui/aura/window_targeter.h
@@ -14,8 +14,16 @@ class KeyEvent;
 class LocatedEvent;
 }  // namespace ui
 
+namespace gfx {
+class Point;
+}  // namespace gfx
+
 namespace aura {
 
+// Key for native window proprety 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 {
@@ -60,6 +68,19 @@ class AURA_EXPORT WindowTargeter : public ui::EventTargeter {
   ui::EventTarget* FindNextBestTarget(ui::EventTarget* previous_target,
                                       ui::Event* event) override;
 
+  // Returns true if |child|'s bounds can extend outside of |parent|'s bounds.
+  static bool ChildHasBoundsOutsideParent(Window* parent, Window *child);

[Lei Zhang, 2016/08/19 03:28:47]

'*' goes with the type, not the name.

[rbpotter, 2016/08/19 16:59:42]

Done.

+
+  // Returns whether the location of |event_point| is in an actionable region of
+  // |window| or 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
+  // then |event_point| is in |window|'s parent's coordinate system, if false
+  // |event_point| is in |window|'s coordinate system.
+  bool HasIndependentChildWithEvent(Window* window,
+                                    const gfx::Point& event_point,
+                                    bool in_parent_coordinates);
+
  private:
   Window* FindTargetForKeyEvent(Window* root_window, const ui::KeyEvent& event);
   Window* FindTargetForNonKeyEvent(Window* root_window, ui::Event* event);