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

chrome/browser/ui/cocoa/browser_window_controller.mm

 // Copyright 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.
 
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 
 #include <cmath>
 #include <numeric>
 #include <utility>
 
@@ skipping 1128 matching lines @@
 }
 
 - (NSView*)activeTabView {
   return [tabStripController_ activeTabView];
 }
 
 - (void)setIsLoading:(BOOL)isLoading force:(BOOL)force {
   [toolbarController_ setIsLoading:isLoading force:force];
 }
 
+- (BOOL)locationBarHasFocus {
+  return [toolbarController_ locationBarHasFocus];
+}
+
 // Make the location bar the first responder, if possible.
 - (void)focusLocationBar:(BOOL)selectAll {
   [toolbarController_ focusLocationBar:selectAll];
 }
 
 - (void)focusTabContents {
   content::WebContents* const activeWebContents =
       browser_->tab_strip_model()->GetActiveWebContents();
   if (activeWebContents)
     activeWebContents->Focus();
@@ skipping 855 matching lines @@
 
 - (NSRect)savedRegularWindowFrame {
   return savedRegularWindowFrame_;
 }
 
 - (BOOL)isFullscreenTransitionInProgress {
   return enteringAppKitFullscreen_ || exitingAppKitFullscreen_;
 }
 
 @end  // @implementation BrowserWindowController(WindowType)