Fix findbar z-ordering issue in fullscreen mode.

chrome/browser/ui/cocoa/browser_window_controller.mm

Index: chrome/browser/ui/cocoa/browser_window_controller.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_controller.mm b/chrome/browser/ui/cocoa/browser_window_controller.mm
index 91041c593e03322299df1445479c79defd1ab714..212e31e1c39d1036a602644c4386ba6bacebb99a 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.mm
+++ b/chrome/browser/ui/cocoa/browser_window_controller.mm
@@ -1436,10 +1436,13 @@ enum {
 
   // 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