MacViews: Attach child windows when parent is on the screen.

ui/views/cocoa/native_widget_mac_nswindow.mm

 // 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.
 
 #import "ui/views/cocoa/native_widget_mac_nswindow.h"
 
 #include "base/mac/foundation_util.h"
 #import "ui/views/cocoa/bridged_native_widget.h"
 #import "ui/base/cocoa/user_interface_item_command_handler.h"
 #import "ui/views/cocoa/views_nswindow_delegate.h"
@@ skipping 105 matching lines @@
   }
 
   // Send to the menu, after converting the event into an action message using
   // the content view.
   if (type == NSKeyDown)
     [[self contentView] keyDown:event];
   else
     [[self contentView] keyUp:event];
 }
 
-// Override display, since this is the first opportunity Cocoa gives to detect
-// a visibility change in some cases. For example, restoring from the dock first
-// calls -[NSWindow display] before any NSWindowDelegate functions and before
-// ordering the window (and without actually calling -[NSWindow deminiaturize]).
-// By notifying the delegate that a display is about to occur, it can apply a
-// correct visibility state, before [super display] requests a draw of the
-// contentView. -[NSWindow isVisible] can still report NO at this point, so this
-// gives the delegate time to apply correct visibility before the draw occurs.
-- (void)display {
-  [[self viewsNSWindowDelegate] onWindowWillDisplay];
-  [super display];
-}
-
 // Override window order functions to intercept other visibility changes. This
 // is needed in addition to the -[NSWindow display] override because Cocoa
 // hardly ever calls display, and reports -[NSWindow isVisible] incorrectly
 // when ordering in a window for the first time.
 - (void)orderWindow:(NSWindowOrderingMode)orderingMode
          relativeTo:(NSInteger)otherWindowNumber {
-  [[self viewsNSWindowDelegate] onWindowOrderWillChange:orderingMode];
   [super orderWindow:orderingMode relativeTo:otherWindowNumber];
   [[self viewsNSWindowDelegate] onWindowOrderChanged:nil];
 }
 
 // NSResponder implementation.
 
 - (BOOL)performKeyEquivalent:(NSEvent*)event {
   return [commandDispatcher_ performKeyEquivalent:event];
 }
 
@@ skipping 53 matching lines @@
     id appController = [NSApp delegate];
     DCHECK([appController
         conformsToProtocol:@protocol(NSUserInterfaceValidations)]);
     return [appController validateUserInterfaceItem:item];
   }
 
   return [super validateUserInterfaceItem:item];
 }
 
 @end