[Mac] Implement LocationBarViewMac::UpdateLocationBarVisibility()

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.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_LOCATION_BAR_LOCATION_BAR_VIEW_MAC_H_
 #define CHROME_BROWSER_UI_COCOA_LOCATION_BAR_LOCATION_BAR_VIEW_MAC_H_
 
 #include <string>
 
 #import <Cocoa/Cocoa.h>
@@ skipping 20 matching lines @@
 class ManagePasswordsDecoration;
 class MicSearchDecoration;
 class PageActionDecoration;
 class Profile;
 class SelectedKeywordDecoration;
 class StarDecoration;
 class TranslateDecoration;
 class ZoomDecoration;
 class ZoomDecorationTest;
 
+namespace chrome {
+
+// Names of the notifications used to indicate whether the location bar should
+// be shown or hidden.
+extern NSString* const kShowToolbarNotification;
+extern NSString* const kHideToolbarNotification;
+
+}  // namespace chrome
+
 // A C++ bridge class that represents the location bar UI element to
 // the portable code.  Wires up an OmniboxViewMac instance to
 // the location bar text field, which handles most of the work.
 
 class LocationBarViewMac : public LocationBar,
                            public LocationBarTesting,
                            public ChromeOmniboxEditController,
                            public SearchModelObserver,
                            public ui_zoom::ZoomEventManagerObserver {
  public:
@@ skipping 208 matching lines @@
   scoped_ptr<MicSearchDecoration> mic_search_decoration_;
 
   // The right-hand-side button to manage passwords associated with a page.
   scoped_ptr<ManagePasswordsDecoration> manage_passwords_decoration_;
 
   Browser* browser_;
 
   // Used to change the visibility of the star decoration.
   BooleanPrefMember edit_bookmarks_enabled_;
 
+  bool show_location_bar_;

[tapted, 2015/09/08 05:55:06]

Can you just infer this from [field_ isHidden]?

[dominickn, 2015/10/09 06:37:02]

Done.

+
   // Used to schedule a task for the first run info bubble.
   base::WeakPtrFactory<LocationBarViewMac> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LocationBarViewMac);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_LOCATION_BAR_LOCATION_BAR_VIEW_MAC_H_