Reapply 266653 "[Mac] Allow fullscreen transitions while constrai..."

trunk/src/chrome/browser/ui/cocoa/browser_window_controller_private.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/browser_window_controller_private.h"
 
 #include <cmath>
 
 #include "base/command_line.h"
 #import "base/mac/scoped_nsobject.h"
@@ skipping 259 matching lines @@
   // Place the download shelf, if any, at the bottom of the view.
   minY = [self layoutDownloadShelfAtMinX:minX minY:minY width:width];
 
   // Finally, the content area takes up all of the remaining space.
   NSRect contentAreaRect = NSMakeRect(minX, minY, width, maxY - minY);
   [self layoutTabContentArea:contentAreaRect];
 
   // Normally, we don't need to tell the toolbar whether or not to show the
   // divider, but things break down during animation.
   [toolbarController_ setDividerOpacity:[self toolbarDividerOpacity]];
+
+  // Update the position of the active constrained window sheet.  We force this
+  // here because the |sheetParentView| may not have been resized (e.g., to
+  // prevent jank during a fullscreen mode transition), but constrained window
+  // sheets also compute their position based on the bookmark bar and toolbar.
+  content::WebContents* const activeWebContents =
+      browser_->tab_strip_model()->GetActiveWebContents();
+  NSView* const sheetParentView = activeWebContents ?
+      GetSheetParentViewForWebContents(activeWebContents) : nil;
+  if (sheetParentView) {
+    [[NSNotificationCenter defaultCenter]
+      postNotificationName:NSViewFrameDidChangeNotification
+                    object:sheetParentView];
+  }
 }
 
 - (CGFloat)floatingBarHeight {
   if (![self inPresentationMode])
     return 0;
 
   CGFloat totalHeight = [presentationModeController_ floatingBarVerticalOffset];
 
   if ([self hasTabStrip])
     totalHeight += NSHeight([[self tabStripView] frame]);
@@ skipping 705 matching lines @@
   }
 }
 
 - (void)updateInfoBarTipVisibility {
   // If there's no toolbar then hide the infobar tip.
   [infoBarContainerController_
       setShouldSuppressTopInfoBarTip:![self hasToolbar]];
 }
 
 @end  // @implementation BrowserWindowController(Private)