mac: Window buttons should keep "active" view when bubbles / tabpose are open on 10.7

chrome/browser/ui/cocoa/info_bubble_window.mm

 // Copyright (c) 2011 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 "chrome/browser/ui/cocoa/info_bubble_window.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/scoped_nsobject.h"
 #include "content/common/content_notification_types.h"
@@ skipping 121 matching lines @@
 
 // According to
 // http://www.cocoabuilder.com/archive/message/cocoa/2006/6/19/165953,
 // NSBorderlessWindowMask windows cannot become key or main. In this
 // case, this is not a desired behavior. As an example, the bubble could have
 // buttons.
 - (BOOL)canBecomeKeyWindow {
   return YES;
 }
 
+- (BOOL)_sharesParentKeyState {

[Robert Sesek, 2011/08/05 19:19:43]

Should comment what this does and on which OSes it does it.

+  return YES;
+}
+
 - (void)close {
   // Block the window from receiving events while it fades out.
   closing_ = YES;
 
   if (!delayOnClose_) {
     [self finishCloseAfterAnimation];
   } else {
     // Apply animations to hide self.
     [NSAnimationContext beginGrouping];
     [[NSAnimationContext currentContext]
@@ skipping 61 matching lines @@
 - (void)sendEvent:(NSEvent*)theEvent {
   if (!closing_)
     [super sendEvent:theEvent];
 }
 
 - (BOOL)isClosing {
   return closing_;
 }
 
 @end