[Mac] Implement LocationBarViewMac::UpdateLocationBarVisibility()

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h

Index: chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h
diff --git a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h
index 1459ea60f5679c23a6dac863aa92af47f8127bf6..9e7fee57b49be1e6d46d8578e1e462c68b2db5a0 100644
--- a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h
+++ b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h
@@ -38,6 +38,15 @@ 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.
@@ -266,6 +275,8 @@ class LocationBarViewMac : public LocationBar,
   // 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_;