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

ash/wm/resize_handle_window_targeter.cc

 // Copyright 2014 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.
 
 #include "ash/wm/resize_handle_window_targeter.h"
 
 #include "ash/common/ash_constants.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/wm/immersive_fullscreen_controller.h"
 #include "ash/wm/window_state_aura.h"
 #include "ui/aura/window.h"
+#include "ui/aura/window_targeter.h"
 #include "ui/events/event.h"
 
 namespace ash {
 
 ResizeHandleWindowTargeter::ResizeHandleWindowTargeter(
     aura::Window* window,
     WmImmersiveFullscreenController* controller)
     : window_(window), immersive_controller_(controller) {
   wm::WindowState* window_state = wm::GetWindowState(window_);
   OnPostWindowStateTypeChange(window_state, wm::WINDOW_STATE_TYPE_DEFAULT);
@@ skipping 41 matching lines @@
       // being generated.
       insets = gfx::Insets(kImmersiveFullscreenTopEdgeInset, 0, 0, 0);
     } else {
       // If the event falls very close to the inside of the frame border, then
       // target the window itself, so that the window can be resized easily.
       insets = frame_border_inset_;
     }
 
     if (!insets.IsEmpty()) {
       gfx::Rect bounds = gfx::Rect(window_->bounds().size());
-      bounds.Inset(insets);
-      if (!bounds.Contains(event->location()))
+      gfx::Rect insetBounds(bounds);
+      insetBounds.Inset(insets);
+      if (!insetBounds.Contains(event->location()) &&
+          !HasIndependentChildWithEvent(window, event->location(), false))
         return window_;
     }
   }
   return aura::WindowTargeter::FindTargetForLocatedEvent(window, event);
 }
 
 bool ResizeHandleWindowTargeter::SubtreeShouldBeExploredForEvent(
     aura::Window* window,
     const ui::LocatedEvent& event) {
   if (window == window_) {
     // Defer to the parent's targeter on whether |window_| should be able to
     // receive the event.
     ui::EventTarget* parent =
         static_cast<ui::EventTarget*>(window)->GetParentTarget();
     if (parent) {
       aura::WindowTargeter* targeter =
           static_cast<aura::WindowTargeter*>(parent->GetEventTargeter());
       if (targeter)
         return targeter->SubtreeShouldBeExploredForEvent(window, event);
     }
   }
   return aura::WindowTargeter::SubtreeShouldBeExploredForEvent(window, event);
 }
 
 }  // namespace ash