[Mac] Fix for the tab detach position

chrome/browser/ui/cocoa/tabs/tab_strip_drag_controller.mm

 // Copyright (c) 2012 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/tabs/tab_strip_drag_controller.h"
 
 #include <Carbon/Carbon.h>
 
 #include "base/mac/scoped_cftyperef.h"
 #import "base/mac/sdk_forward_declarations.h"
@@ skipping 334 matching lines @@
   NSTimeInterval tearProgress =
       [NSDate timeIntervalSinceReferenceDate] - tearTime_;
   tearProgress /= kTearDuration;  // Normalize.
   tearProgress = sqrtf(MAX(MIN(tearProgress, 1.0), 0.0));
 
   // Move the dragged window to the right place on the screen.
   // TODO(spqchan): Write a test to check if the window is at the right place.
   // See http://crbug.com/687647.
   NSPoint origin = sourceWindowFrame_.origin;
   origin.x += (thisPoint.x - dragOrigin_.x);
-  origin.y +=
-      (thisPoint.y - dragOrigin_.y) +
-      ([sourceController_ menubarOffset] + [sourceController_ menubarHeight]);
+  origin.y += (thisPoint.y - dragOrigin_.y);
+  if ([sourceController_ isInAnyFullscreenMode]) {
+    origin.y +=
+        [sourceController_ menubarOffset] + [sourceController_ menubarHeight];
+  }
 
   if (tearProgress < 1) {
     // If the tear animation is not complete, call back to ourself with the
     // same event to animate even if the mouse isn't moving. We need to make
     // sure these get cancelled in -endDrag:.
     [NSObject cancelPreviousPerformRequestsWithTarget:self];
     [self performSelector:@selector(continueDrag:)
                withObject:theEvent
                afterDelay:1.0f/30.0f];
 
@@ skipping 204 matching lines @@
     [[targetController_ window] makeMainWindow];
   } else {
     [dragWindow_ setAlphaValue:0.5];
     [[draggedController_ overlayWindow] setHasShadow:NO];
     [[draggedController_ window] makeMainWindow];
   }
   chromeIsVisible_ = shouldBeVisible;
 }
 
 @end