Folder structure is not maintained on sync for imported data on both Pyramid 0 & Pyramid 1

[srirambv]

• Did you search for similar issues before submitting this one?
  Yes

• Describe the issue you encountered:
  Imported data in not properly sync'd between Windows machines

• Platform (Win7, 8, 10? macOS? Linux distro?):
  Pyramid 0 Windows 10 x64
  Pyramid 1 Windows 7 ia32

• Brave Version (revision SHA):
  Both running

Name	Version
Brave	0.15.312
rev	cc653ff
Muon	3.0.202
libchromiumcontent	58.0.3029.110
V8	5.8.283.38
Node.js	7.9.0
Update Channel	dev
os.platform	win32
os.release	6.1.7601
os.arch	ia32

• Steps to reproduce:

  1. Enable Sync on pyramid 0 and sync with pyramid 1 using secret code
  2. Import Chrome data on pyramid 0, shows folder Imported from Chrome
  3. After pyramid 1 sync's and receives data folder structure is lost on pyramid 1
  4. Pyramid 0 recreates the import data similar to pyramid 1 (due to Import data gets duplicated after sync #8508)

• Actual result:
  Folder structure is not maintained on sync for imported data on both Pyramid 0 & Pyramid 1

• Expected result:
  Should retain folder structure

• Will the steps above reproduce in a fresh profile? If not what other info can be added?
  Yes

• Is this an issue in the currently released version?
  Need to verify but could be a regressed issue

• Can this issue be consistently reproduced?
  Yes

• Extra QA steps:
  1.
  2.
  3.

• Screenshot if needed:
  Pyramid 0 after sync
  
  Pyramid 1 after sync
  

• Any related issues:

[bsclifton]

Closing; this is a dupe of #8454