spellcheck error: session_bridge_ was not declared

cmake config
-DQT_FEATURE_webengine_native_spellchecker=ON
 
i guess this option is only valid on android
my platform is linux
 
with this option, ninja throws in the middle of build phase:
 
–
 
[21760/26121] CXX obj/components/spellcheck/browser/browser/spell_check_host_impl.o
 
FAILED: obj/components/spellcheck/browser/browser/spell_check_host_impl.o
 
../../../../../src/3rdparty/chromium/components/spellcheck/browser/spell_check_host_impl.cc:
In member function 'virtual void SpellCheckHostImpl::RequestTextCheck
(const string16&, int, spellcheck::mojom::SpellCheckHost::RequestTextCheckCallback)':
 
../../../../../src/3rdparty/chromium/components/spellcheck/browser/spell_check_host_impl.cc:52:3:
error: 'session_bridge_' was not declared in this scope
 
 
–
 
upstream sources
https://source.chromium.org/chromium/chromium/src/+/master:components/spellcheck/browser/spell_check_host_impl.cc;l=52
https://source.chromium.org/chromium/chromium/src/+/master:components/spellcheck/browser/spell_check_host_impl.h;l=70
 
header file says:
 
#if defined(OS_ANDROID)
// Android-specific object used to query the Android spellchecker.
SpellCheckerSessionBridge session_bridge_;
#endif