Fix findbar z-ordering issue in fullscreen mode.

chrome/browser/ui/cocoa/browser_window_controller.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/browser_window_controller.h"
 
 #include <Carbon/Carbon.h>
 
 #include <cmath>
 #include <numeric>
@@ skipping 1418 matching lines @@
   }
   return downloadShelfController_;
 }
 
 - (void)addFindBar:(FindBarCocoaController*)findBarCocoaController {
   // Shouldn't call addFindBar twice.
   DCHECK(!findBarCocoaController_.get());
 
   // Create a controller for the findbar.
   findBarCocoaController_.reset([findBarCocoaController retain]);
-  NSView *contentView = [[self window] contentView];
+  NSView* contentView = [[self window] contentView];
+  NSView* relativeView =
+      [self inPresentationMode] ? [toolbarController_ view] :
+                                  [infoBarContainerController_ view];
   [contentView addSubview:[findBarCocoaController_ view]
                positioned:NSWindowAbove
-               relativeTo:[infoBarContainerController_ view]];
+               relativeTo:relativeView];
 
   // Place the find bar immediately below the toolbar/attached bookmark bar. In
   // presentation mode, it hangs off the top of the screen when the bar is
   // hidden.
   CGFloat maxY = [self placeBookmarkBarBelowInfoBar] ?
       NSMinY([[toolbarController_ view] frame]) :
       NSMinY([[bookmarkBarController_ view] frame]);
   CGFloat maxWidth = NSWidth([contentView frame]);
   [findBarCocoaController_ positionFindBarViewAtMaxY:maxY maxWidth:maxWidth];
 
@@ skipping 833 matching lines @@
 
 - (BOOL)supportsBookmarkBar {
   return [self supportsWindowFeature:Browser::FEATURE_BOOKMARKBAR];
 }
 
 - (BOOL)isTabbedWindow {
   return browser_->is_type_tabbed();
 }
 
 @end  // @implementation BrowserWindowController(WindowType)