Change grow box computation back to a method on BrowserWindow

chrome/browser/ui/cocoa/browser_window_cocoa.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.
 
 #include "chrome/browser/ui/cocoa/browser_window_cocoa.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
@@ skipping 357 matching lines @@
 
 bool BrowserWindowCocoa::IsTabStripEditable() const {
   return ![controller_ isDragSessionActive];
 }
 
 bool BrowserWindowCocoa::IsToolbarVisible() const {
   return browser_->SupportsWindowFeature(Browser::FEATURE_TOOLBAR) ||
          browser_->SupportsWindowFeature(Browser::FEATURE_LOCATIONBAR);
 }
 
+gfx::Rect BrowserWindowCocoa::GetRootWindowResizerRect() const {
+  NSRect tabRect = [controller_ selectedTabGrowBoxRect];
+  return gfx::Rect(NSRectToCGRect(tabRect));
+}
+
 bool BrowserWindowCocoa::IsPanel() const {
   return false;
 }
 
 // This is called from Browser, which in turn is called directly from
 // a menu option.  All we do here is set a preference.  The act of
 // setting the preference sends notifications to all windows who then
 // know what to do.
 void BrowserWindowCocoa::ToggleBookmarkBar() {
   bookmark_utils::ToggleWhenVisible(browser_->profile());
@@ skipping 236 matching lines @@
   AvatarMenuBubbleController* menu =
       [[AvatarMenuBubbleController alloc] initWithBrowser:browser_
                                                anchoredAt:point];
   [[menu bubble] setAlignment:info_bubble::kAlignEdgeToAnchorEdge];
   [menu showWindow:nil];
 }
 
 void BrowserWindowCocoa::ShowAvatarBubbleFromAvatarButton() {
   [[controller_ avatarButtonController] showAvatarBubble];
 }