[Mac] Retain location bar focus on switching to fullscreen and back.

chrome/browser/ui/cocoa/browser_window_controller.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_BROWSER_WINDOW_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_BROWSER_WINDOW_CONTROLLER_H_
 
 // A class acting as the Objective-C controller for the Browser
 // object. Handles interactions between Cocoa and the cross-platform
 // code. Each window has a single toolbar and, by virtue of being a
@@ skipping 262 matching lines @@
 - (void)zoomChangedForActiveTab:(BOOL)canShowBubble;
 
 // Called to tell the selected tab to update its loading state.
 // |force| is set if the update is due to changing tabs, as opposed to
 // the page-load finishing.  See comment in reload_button_cocoa.h.
 - (void)setIsLoading:(BOOL)isLoading force:(BOOL)force;
 
 // Brings this controller's window to the front.
 - (void)activate;
 
+// Return YES if the location bar is the first responder.
+- (BOOL)locationBarHasFocus;
+
 // Make the location bar the first responder, if possible.
 - (void)focusLocationBar:(BOOL)selectAll;
 
 // Make the (currently-selected) tab contents the first responder, if possible.
 - (void)focusTabContents;
 
 // Returns the frame of the regular (non-fullscreened) window (even if the
 // window is currently in fullscreen mode).  The frame is returned in Cocoa
 // coordinates (origin in bottom-left).
 - (NSRect)regularWindowFrame;
@@ skipping 313 matching lines @@
 // Returns the fullscreen toolbar controller.
 - (FullscreenToolbarController*)fullscreenToolbarController;
 
 // Sets the fullscreen toolbar controller.
 - (void)setFullscreenToolbarController:(FullscreenToolbarController*)controller;
 
 @end  // @interface BrowserWindowController (TestingAPI)
 
 
 #endif  // CHROME_BROWSER_UI_COCOA_BROWSER_WINDOW_CONTROLLER_H_