Adding (empty) placeholder button to 'Other bookmarks' folder is unnecessary.

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm
index 5c8db4db9350042c08121840b5a94532b615ee50..c28a01c51c1380e61046c57b507c639eef313e31 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm
@@ -760,9 +760,13 @@ NSRect GetFirstButtonFrameForHeight(CGFloat height) {
 }
 
 - (void)adjustWindowForButtonCount:(NSUInteger)buttonCount {
+  if (buttonCount == 0) {

[Alexei Svitkine (slow), 2014/08/19 17:01:38]

Please add a comment explaining this logic.

[Gaja, 2014/08/20 05:51:32]

Moved this part of code into -removeButton function.

+    [self adjustWindowLeft:0 size:NSMakeSize(0, 0) scrollingBy:0.0];

[Alexei Svitkine (slow), 2014/08/19 17:01:38]

Why make the window 0 size instead of calling -closeBookmarkFolder:?

Also, I think 0-size windows cause problems on the Mac.

[Gaja, 2014/08/20 05:51:32]

I do think so. Changes in patch set 2, please review. Thanks.

+    return;
+  }
   NSRect folderFrame = [folderView_ frame];
   CGFloat newMenuHeight =
-      (CGFloat)[self menuHeightForButtonCount:[buttons_ count]];
+      (CGFloat)[self menuHeightForButtonCount:buttonCount];
   CGFloat deltaMenuHeight = newMenuHeight - NSHeight(folderFrame);
   // If the height has changed then also change the origin, and adjust the
   // scroll (if scrolling).
@@ -1936,9 +1940,10 @@ static BOOL ValueInRangeInclusive(CGFloat low, CGFloat value, CGFloat high) {
         [folderController_
             offsetFolderMenuWindow:NSMakeSize(0.0, chrome::kBookmarkBarHeight)];
     }
-  } else {
+  } else if (parentButton_ != [barController_ otherBookmarksButton]) {
     // If all nodes have been removed from this folder then add in the
-    // 'empty' placeholder button.
+    // 'empty' placeholder button except for "Other bookmarks" folder
+    // as we are going to hide it.
     NSRect buttonFrame =
         GetFirstButtonFrameForHeight([self menuHeightForButtonCount:1]);
     BookmarkButton* button = [self makeButtonForNode:nil