Creates common super class for bookmark handset and tablet view controllers

ios/chrome/browser/ui/bookmarks/bookmark_home_handset_view_controller.h

Index: ios/chrome/browser/ui/bookmarks/bookmark_home_handset_view_controller.h
diff --git a/ios/chrome/browser/ui/bookmarks/bookmark_home_handset_view_controller.h b/ios/chrome/browser/ui/bookmarks/bookmark_home_handset_view_controller.h
index 83bd477283ac44f9f0f462602f3d8274c3ad5aea..486cb1fe58dc8c909151edbe3237185dd4129e54 100644
--- a/ios/chrome/browser/ui/bookmarks/bookmark_home_handset_view_controller.h
+++ b/ios/chrome/browser/ui/bookmarks/bookmark_home_handset_view_controller.h
@@ -5,6 +5,8 @@
 #ifndef IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_HOME_HANDSET_VIEW_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_HOME_HANDSET_VIEW_CONTROLLER_H_
 
+#import "ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller.h"
+
 #import <UIKit/UIKit.h>
 
 #include <set>
@@ -33,7 +35,7 @@ class ChromeBrowserState;
 @end
 
 // Navigate/edit the bookmark hierarchy on a handset.
-@interface BookmarkHomeHandsetViewController : UIViewController {
+@interface BookmarkHomeHandsetViewController : BookmarkHomeViewController {
  @protected
   // The following 2 ivars both represent the set of nodes being edited.
   // The set is for fast lookup.
@@ -57,9 +59,6 @@ class ChromeBrowserState;
 @property(nonatomic, assign, readonly) BOOL editing;
 // The set of selected index paths for edition.
 @property(nonatomic, strong, readonly) NSMutableArray* editIndexPaths;
-@property(nonatomic, assign, readonly) bookmarks::BookmarkModel* bookmarks;
-@property(nonatomic, weak, readonly) id<UrlLoader> loader;
-@property(nonatomic, assign, readonly) ios::ChromeBrowserState* browserState;
 
 #pragma mark - Relevant Methods
 // Replaces |_editNodes| and |_editNodesOrdered| with new container objects.