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

chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm

Index: chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm
diff --git a/chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm b/chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm
index de28b7a66ccf66dfe3de1d44334b72a67abb6517..163187f0967e76abaf2fd32a624a22a8553612f1 100644
--- a/chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm
+++ b/chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm
@@ -598,6 +598,10 @@ class NotificationBridge : public AppMenuIconController::Delegate {
   locationBarView_->OnAddedToWindow();
 }
 
+- (BOOL)locationBarHasFocus {
+  return [autocompleteTextFieldEditor_ window] != nil;
+}
+
 - (void)focusLocationBar:(BOOL)selectAll {
   if (locationBarView_.get()) {
     locationBarView_->FocusLocation(selectAll ? true : false);