[PermissionBubble] Remove bubble from previous manager.

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"
 #import "base/mac/sdk_forward_declarations.h"
@@ skipping 312 matching lines @@
 }
 
 void BrowserWindowCocoa::SetTranslateIconToggled(bool is_lit) {
   [controller_ setCurrentPageIsTranslated:is_lit];
 }
 
 void BrowserWindowCocoa::OnActiveTabChanged(content::WebContents* old_contents,
                                             content::WebContents* new_contents,
                                             int index,
                                             int reason) {
+  [controller_ onActiveTabChanged:old_contents to:new_contents];
   // TODO(pkasting): Perhaps the code in
   // TabStripController::activateTabWithContents should move here?  Or this
   // should call that (instead of TabStripModelObserverBridge doing so)?  It's
   // not obvious to me why Mac doesn't handle tab changes in BrowserWindow the
   // way views and GTK do.
+  // See http://crbug.com/340720 for discussion.
 }
 
 void BrowserWindowCocoa::ZoomChangedForActiveTab(bool can_show_bubble) {
   [controller_ zoomChangedForActiveTab:can_show_bubble ? YES : NO];
 }
 
 gfx::Rect BrowserWindowCocoa::GetRestoredBounds() const {
   // Flip coordinates based on the primary screen.
   NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
   NSRect frame = [controller_ regularWindowFrame];
@@ skipping 483 matching lines @@
 void BrowserWindowCocoa::UnhideDownloadShelf() {
   GetDownloadShelf()->Unhide();
 }
 
 void BrowserWindowCocoa::HideDownloadShelf() {
   GetDownloadShelf()->Hide();
   StatusBubble* statusBubble = GetStatusBubble();
   if (statusBubble)
     statusBubble->Hide();
 }