Okay, I'm another one who has had problems syncing my Chrome bookmarks with both my Samsung S5 phone and my iPad. I had gone into my bookmark manager on my desktop to clean out some junk and duplicate bookmarks, then exported my bookmarks to an HTML file. I then deleted all my bookmarks in Chrome and imported the saved file. But I noticed that I no longer had an Other Bookmarks folder. Instead I had an Imported Bookmarks folder and a Bookmarks Bar folder for the bookmarks I had saved on my Chrome bookmarks bar. I had also cleaned out my bookmarks on my phone and iPad to get a fresh set that would match with my nice clean set on my desktop browser. No joy--the bookmarks would not sync no matter how much I played with the settings, logged in and out, everything I could think of. I noticed that there were three folders on my Samsung, titled Desktop Bookmarks, Other Bookmarks, and Mobile Bookmarks, but all were empty. I decided to go into the Bookmark Manager on my desktop and create a new folder that I named Other Bookmarks. I then moved all the bookmarks from the Imported Bookmarks folder to the Other Bookmarks folder, and lo and behold all the bookmarks were on my phone and iPad. So check and be certain that the main folder in your bookmarks is titled Other Bookmarks.