Link to Build:
==============
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/win%20trunk/builds/52977

Link to Log:
============
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/win%20trunk/builds/52977/steps/compile/logs/stdio

Error Log:
==========
FAILED: gen/chrome/theme_resources_stamp.d.stamp gen/chrome/grit/theme_resources.h gen/chrome/grit/theme_resources_map.cc gen/chrome/grit/theme_resources_map.h gen/chrome/theme_resources_100_percent.pak gen/chrome/theme_resources_200_percent.pak gen/chrome/theme_resources_300_percent.pak 
C:/b/depot_tools/python276_bin/python.exe ../../tools/grit/grit.py -i ../../chrome/app/theme/theme_resources.grd build -o gen/chrome --depdir . --depfile gen/chrome/theme_resources_stamp.d --write-only-new=1 --depend-on-stamp -D _google_chrome -E CHROMIUM_BUILD=google_chrome -D toolkit_views -D use_aura -D enable_media_router -D enable_app_list=false -D enable_background=true -D enable_extensions=true -D enable_google_now=false -D enable_hangout_services_extension=true -D enable_hotwording=false -D enable_plugins=true -D enable_print_preview=true -D enable_printing=true -D enable_service_discovery=true -D enable_vr_shell=false -D enable_webrtc=true -D enable_webvr=false -D mac_views_browser=false -D safe_browsing_mode=1 -D use_vulcanize=true -f ../../tools/gritsettings/resource_ids --assert-file-list=obj/chrome/app/theme/theme_resources_expected_outputs.txt
Error processing node <?xml version="1.0" encoding="UTF-8"?>
<structure file="common/incognito.png" name="IDR_ICON_PROFILES_MENU_INCOGNITO" type="chrome_scaled_image" />
Traceback (most recent call last):

File "../../tools/grit/grit.py", line 15, in <module>grit.grit_runner.Main(sys.argv[1:])
File "C:\b\build\slave\win_trunk\build\src\tools\grit\grit\grit_runner.py", line 268, in Maintoolobject.Run(options, args[1:])
File "C:\b\build\slave\win_trunk\build\src\tools\grit\grit\tool\build.py", line 258, in Runself.Process()
File "C:\b\build\slave\win_trunk\build\src\tools\grit\grit\tool\build.py", line 385, in Processself.ProcessNode(self.res, output, outfile)
File "C:\b\build\slave\win_trunk\build\src\tools\grit\grit\tool\build.py", line 322, in ProcessNodeformatted = formatter(node, output_node.GetLanguage(), output_dir=base_dir)
File "C:\b\build\slave\win_trunk\build\src\tools\grit\grit\format\data_pack.py", line 45, in Formatid, value = node.GetDataPackPair(lang, UTF8)
File "C:\b\build\slave\win_trunk\build\src\tools\grit\grit\node\structure.py", line 209, in GetDataPackPairreturn id, self.gatherer.GetData(lang, encoding)
File "C:\b\build\slave\win_trunk\build\src\tools\grit\grit\gather\chrome_scaled_image.py", line 147, in GetDatapath, scale, req_scale = self._FindInputFile()
File "C:\b\build\slave\win_trunk\build\src\tools\grit\grit\gather\chrome_scaled_image.py", line 134, in _FindInputFile'Tried ' + self.grd_node.ToRealPath(os.path.join(dir, self.rc_file))) grit.exception.FileNotFound: The resource file was not found.
: Tried ..\..\chrome\app\theme\default_100_percent\common\incognito.png

Suspecting the below change could be a possible culprit, 

Change-Url: https://chromium.googlesource.com/chromium/src/+/02c22847c5da0c157fdc4ef33826126d4625092f
Review-Url: https://codereview.chromium.org/2585453004

@estade: Assigning to you, request you to please take a look into it. Please help us to find an owner if not with respect to your change.

Thanks.!