[Mac] Update location bar colors when change themes in Material Design.

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 b0469bc9f3d10d5c71e6c97a6fabe9c5b937b0a7..0e0bb477719f3957a4ffd4147a17e7f62ae96b1c 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
@@ -162,11 +162,19 @@ class LocationBarViewMac : public LocationBar,
   // Set the location bar's icon to the correct image for the current URL.
   void UpdateLocationIcon();
 
+  // Set the location bar's controls to visibly match the current theme.
+  void UpdateColorsToMatchTheme();
+
   // Notify the location bar that it was added to the browser window. Provides
   // an update point for interface objects that need to set their appearance
   // based on the window's theme.
   void OnAddedToWindow();
 
+  // Notify the location bar that the browser window theme has changed. Provides
+  // an update point for interface objects that need to set their appearance
+  // based on the window's theme.
+  void OnThemeChanged();
+
   // ChromeOmniboxEditController:
   void UpdateWithoutTabRestore() override;
   void OnChanged() override;