Change grow box computation back to a method on BrowserWindow

chrome/browser/ui/panels/panel_window_controller_cocoa.mm

Index: chrome/browser/ui/panels/panel_window_controller_cocoa.mm
diff --git a/chrome/browser/ui/panels/panel_window_controller_cocoa.mm b/chrome/browser/ui/panels/panel_window_controller_cocoa.mm
index c1ed457b6e66f1c08423dd21226c07beb0ebf3f7..41a7ebc508dafd0a13f0aa6ee7ed7be5c0780cf5 100644
--- a/chrome/browser/ui/panels/panel_window_controller_cocoa.mm
+++ b/chrome/browser/ui/panels/panel_window_controller_cocoa.mm
@@ -23,6 +23,7 @@
 #import "chrome/browser/ui/cocoa/find_bar/find_bar_cocoa_controller.h"
 #import "chrome/browser/ui/cocoa/menu_controller.h"
 #import "chrome/browser/ui/cocoa/tab_contents/favicon_util.h"
+#import "chrome/browser/ui/cocoa/tab_contents/tab_contents_controller.h"
 #import "chrome/browser/ui/cocoa/tabs/throbber_view.h"
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_bounds_animation.h"
@@ -79,8 +80,7 @@ enum {
     animateOnBoundsChange_ = YES;
   }
   contentsController_.reset(
-      [[TabContentsController alloc] initWithContents:nil
-                                             delegate:nil]);
+      [[TabContentsController alloc] initWithContents:nil]);
   return self;
 }
 
@@ -258,7 +258,7 @@ enum {
 
 - (void)tabDetached:(WebContents*)contents {
   DCHECK(contents == [contentsController_ webContents]);
-  [contentsController_ changeWebContents:NULL];
+  [contentsController_ changeWebContents:nil];
   [[contentsController_ view] setHidden:YES];
 }