After start building in manual mode i got
c:\code\chromium_git\chromium\src>ninja -C out\Release_GN_x86 cef
ninja: Entering directory `out\Release_GN_x86'
[4/10366] CXX obj/cc/blink/blink/web_display_item_list_impl.obj
FAILED: obj/cc/blink/blink/web_display_item_list_impl.obj
ninja -t msvc -e environment.x86 -- "c:\program files (x86)\microsoft visual studio 14.0\vc\bin\amd64_x86/cl.exe" /nologo /showIncludes @obj/cc/blink/blink/web_display_item_list_impl.obj.rsp /c ../../cc/blink/web_display_item_list_impl.cc /Foobj/cc/blink/blink/web_display_item_list_impl.obj /Fd"obj/cc/blink/blink_cc.pdb"
cl : Command line warning D9025 : overriding '/MT' with '/MD'
c:\code\chromium_git\chromium\src\cc/blink/web_display_item_list_impl.h(36): error C2220: warning treated as error - no 'object' file generated
c:\code\chromium_git\chromium\src\cc/blink/web_display_item_list_impl.h(36): warning C4275: non dll-interface class 'blink::WebDisplayItemList' used as base for dll-interface class 'cc_blink::WebDisplayItemListImpl'
c:\code\chromium_git\chromium\src\third_party/WebKit/public/platform/WebDisplayItemList.h(35): note: see declaration of 'blink::WebDisplayItemList'
c:\code\chromium_git\chromium\src\cc/blink/web_display_item_list_impl.h(36): note: see declaration of 'cc_blink::WebDisplayItemListImpl'
[6/10366] CXX obj/cc/blink/blink/web_content_layer_impl.obj
FAILED: obj/cc/blink/blink/web_content_layer_impl.obj
ninja -t msvc -e environment.x86 -- "c:\program files (x86)\microsoft visual studio 14.0\vc\bin\amd64_x86/cl.exe" /nologo /showIncludes @obj/cc/blink/blink/web_content_layer_impl.obj.rsp /c ../../cc/blink/web_content_layer_impl.cc /Foobj/cc/blink/blink/web_content_layer_impl.obj /Fd"obj/cc/blink/blink_cc.pdb"
cl : Command line warning D9025 : overriding '/MT' with '/MD'
c:\code\chromium_git\chromium\src\cc/blink/web_display_item_list_impl.h(36): error C2220: warning treated as error - no 'object' file generated
c:\code\chromium_git\chromium\src\cc/blink/web_display_item_list_impl.h(36): warning C4275: non dll-interface class 'blink::WebDisplayItemList' used as base for dll-interface class 'cc_blink::WebDisplayItemListImpl'
c:\code\chromium_git\chromium\src\third_party/WebKit/public/platform/WebDisplayItemList.h(35): note: see declaration of 'blink::WebDisplayItemList'
c:\code\chromium_git\chromium\src\cc/blink/web_display_item_list_impl.h(36): note: see declaration of 'cc_blink::WebDisplayItemListImpl'
[8/10366] CXX obj/cc/blink/blink/web_compositor_support_impl.obj
FAILED: obj/cc/blink/blink/web_compositor_support_impl.obj
ninja -t msvc -e environment.x86 -- "c:\program files (x86)\microsoft visual studio 14.0\vc\bin\amd64_x86/cl.exe" /nologo /showIncludes @obj/cc/blink/blink/web_compositor_support_impl.obj.rsp /c ../../cc/blink/web_compositor_support_impl.cc /Foobj/cc/blink/blink/web_compositor_support_impl.obj /Fd"obj/cc/blink/blink_cc.pdb"
cl : Command line warning D9025 : overriding '/MT' with '/MD'
c:\code\chromium_git\chromium\src\cc/blink/web_display_item_list_impl.h(36): error C2220: warning treated as error - no 'object' file generated
c:\code\chromium_git\chromium\src\cc/blink/web_display_item_list_impl.h(36): warning C4275: non dll-interface class 'blink::WebDisplayItemList' used as base for dll-interface class 'cc_blink::WebDisplayItemListImpl'
c:\code\chromium_git\chromium\src\third_party/WebKit/public/platform/WebDisplayItemList.h(35): note: see declaration of 'blink::WebDisplayItemList'
c:\code\chromium_git\chromium\src\cc/blink/web_display_item_list_impl.h(36): note: see declaration of 'cc_blink::WebDisplayItemListImpl'
[17/10366] CXX obj/content/browser/browser/indexed_db_backing_store.obj
ninja: build stopped: subcommand failed.
What could be the mistake?