feat: enable builtin spellchecker (#20692)

* chore: add code required to use chromes spellchecker

* chore: fix linting

* chore: manifests needs buildflags now

* chore: add dictionarySuggestions to the context menu event when the spellchecker is active

* chore: enable by default for windows builds

* chore: add patch to remove incognito usage in the spellchecker

* chore: add dependencies on spellcheck common and flags

* chore: conditionally include spell check panel impl

* chore: fix deps for spellcheck feature flags

* chore: add patch for electron resources

* chore: add dependency on //components/language/core/browser

* chore: patches to make hunspell work on windows

* build: collect hunspell dictionaries into a zip file and publish

* chore: clean up patches

* chore: add docs and set spell checker url method

* chore: fix error handling

* chore: fix hash logic

* build: update hunspell filename generator

* fix: default spellchecker list to the current system locale if we can

* docs: document the language getter

* chore: patch IDS_ resources for linux builds

* feat: add spellcheck webpref flag to disable the builtin spellchecker

* chore: fix docs typo

* chore: clean up spellchecker impl as per feedback

* remove unneeded deps

script/release/uploaders/upload.py

@@ -106,6 +106,11 @@ def main():
   shutil.copy2(os.path.join(OUT_DIR, 'mksnapshot.zip'), mksnapshot_zip)
   upload_electron(release, mksnapshot_zip, args)
 
+  if PLATFORM == 'linux' and get_target_arch() == 'x64':
+    # Upload the hunspell dictionaries only from the linux x64 build
+    hunspell_dictionaries_zip = os.path.join(OUT_DIR, 'hunspell_dictionaries.zip')
+    upload_electron(release, hunspell_dictionaries_zip, args)
+
   if not tag_exists and not args.upload_to_s3:
     # Upload symbols to symbol server.
     run_python_upload_script('upload-symbols.py')