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

chrome/browser/cocoa/tab_window_controller.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/tab_window_controller.h"
 
 #include "base/logging.h"
 #import "chrome/browser/cocoa/tab_strip_view.h"
 
 @interface TabWindowController(PRIVATE)
@@ skipping 107 matching lines @@
     cachedContentView_ = nil;
   } else {
     NOTREACHED();
   }
 }
 
 - (NSWindow*)overlayWindow {
   return overlayWindow_;
 }
 
+- (BOOL)shouldConstrainFrameRect {
+  // If we currently have an overlay window, do not attempt to change the
+  // window's size, as our overlay window doesn't know how to resize properly.
+  return overlayWindow_ == nil;
+}
+
 - (BOOL)canReceiveFrom:(TabWindowController*)source {
   // subclass must implement
   NOTIMPLEMENTED();
   return NO;
 }
 
 - (void)moveTabView:(NSView*)view
      fromController:(TabWindowController*)dragController {
   NOTIMPLEMENTED();
 }
@@ skipping 73 matching lines @@
 }
 
 // Tell the window that it needs to call performClose: as soon as the current
 // drag is complete. This prevents a window (and its overlay) from going away
 // during a drag.
 - (void)deferPerformClose {
   closeDeferred_ = YES;
 }
 
 @end