[Mac] Restore focus to the tab contents when dismissing the find bar....

chrome/browser/cocoa/find_bar_cocoa_controller.h

 // Copyright (c) 2009 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 <Cocoa/Cocoa.h>
 
 #import "chrome/browser/cocoa/find_bar_cocoa_controller.h"
 
+#include "base/scoped_nsobject.h"
 #include "base/string16.h"
 
 class BrowserWindowCocoa;
 class FindBarBridge;
 class FindNotificationDetails;
+@class FocusTracker;
 
 // A controller for the find bar in the browser window.  Manages
 // updating the state of the find bar and provides a target for the
 // next/previous/close buttons.  Certain operations require a pointer
 // to the cross-platform FindBarController, so be sure to call
 // setFindBarBridge: after creating this controller.
 
 @interface FindBarCocoaController : NSViewController {
  @private
   IBOutlet NSTextField* findText_;
   IBOutlet NSTextField* resultsLabel_;
   IBOutlet NSButton* nextButton_;
   IBOutlet NSButton* previousButton_;
 
   // Needed to call methods on FindBarController.
   FindBarBridge* findBarBridge_;  // weak
+
+  scoped_nsobject<FocusTracker> focusTracker_;
 };
 
 // Initializes a new FindBarCocoaController.
 - (id)init;
 
 - (void)setFindBarBridge:(FindBarBridge*)findBar;
 
 - (IBAction)close:(id)sender;
 
 - (IBAction)nextResult:(id)sender;
 
 - (IBAction)previousResult:(id)sender;
 
 // Positions the find bar based on the location of the infobar container.
 // TODO(rohitrao): Move this logic into BrowserWindowController.
 - (void)positionFindBarView:(NSView*)infoBarContainerView;
 
 // Methods called from FindBarBridge.
 - (void)showFindBar;
 - (void)hideFindBar;
 - (void)setFocusAndSelection;
+- (void)restoreSavedFocus;
 - (void)setFindText:(const string16&)findText;
 
 - (void)clearResults:(const FindNotificationDetails&)results;
 - (void)updateUIForFindResult:(const FindNotificationDetails&)results
                      withText:(const string16&)findText;
 - (BOOL)isFindBarVisible;
 
 @end