[Mac] Fix weird layout issues when dragging a tab from a large screen to a sm...

chrome/browser/cocoa/chrome_browser_window.mm

 // Copyright (c) 2009 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/cocoa/chrome_browser_window.h"
 
 #include "base/logging.h"
 #import "chrome/browser/cocoa/browser_window_controller.h"
 #import "chrome/browser/cocoa/browser_frame_view.h"
 #import "chrome/browser/cocoa/tab_strip_controller.h"
@@ skipping 311 matching lines @@
 }
 
 - (void)setShouldHideTitle:(BOOL)flag {
   shouldHideTitle_ = flag;
 }
 
 -(BOOL)_isTitleHidden {
   return shouldHideTitle_;
 }
 
+- (NSRect)constrainFrameRect:(NSRect)frame toScreen:(NSScreen*)screen {

[pink (ping after 24hrs), 2009/11/13 22:09:57]

add a comment on when and why this gets called.

+  // Do not constrain the frame rect if our delegate says no.  In this case,
+  // return the original (unconstrained) frame.
+  id delegate = [self delegate];
+  if ([delegate respondsToSelector:@selector(shouldConstrainFrameRect)] &&
+      ![delegate shouldConstrainFrameRect])
+    return frame;
+
+  return [super constrainFrameRect:frame toScreen:screen];
+}
+
 @end