Add missing output to prevent warning during compilation
Add missing output to prevent warning during compilation

ninja compilation with gn was reporting the following error as the
listed outputs are different from the real output. Add the missing
file to BUILD.gn

    //chrome/browser/devtools:webrtc_device_provider_resources_grit(//build/toolchain/linux:clang_x64)
    Asserted file list does not match.

    Expected output files:
    chromium/src/out/Debug/gen/chrome/grit/webrtc_device_provider_resources_map.cc
    chromium/src/out/Debug/gen/chrome/grit/webrtc_device_provider_resources_map.h
    chromium/src/out/Debug/gen/chrome/webrtc_device_provider_resources.pak
    Actual output files:
    chromium/src/out/Debug/gen/chrome/grit/webrtc_device_provider_resources.h
    chromium/src/out/Debug/gen/chrome/grit/webrtc_device_provider_resources_map.cc
    chromium/src/out/Debug/gen/chrome/grit/webrtc_device_provider_resources_map.h
    chromium/src/out/Debug/gen/chrome/webrtc_device_provider_resources.pak
    Missing output files:
    chromium/src/out/Debug/gen/chrome/grit/webrtc_device_provider_resources.h
    Extra output files:

BUG=None

Review URL: https://codereview.chromium.org/804403002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#309003}

Just-D/chromium-1,Pluto-tv/chromium-crosswalk,ltilve/chromium,Chilledheart/chromium,krieger-od/nwjs_chromium.src,krieger-od/nwjs_chromium.src,chuan9/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,chuan9/chromium-crosswalk,Chilledheart/chromium,dushu1203/chromium.src,M4sse/chromium.src,markYoungH/chromium.src,hgl888/chromium-crosswalk,M4sse/chromium.src,hgl888/chromium-crosswalk,dednal/chromium.src,Jonekee/chromium.src,chuan9/chromium-crosswalk,dednal/chromium.src,markYoungH/chromium.src,markYoungH/chromium.src,axinging/chromium-crosswalk,Chilledheart/chromium,fujunwei/chromium-crosswalk,Fireblend/chromium-crosswalk,chuan9/chromium-crosswalk,Fireblend/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,mohamed--abdel-maksoud/chromium.src,krieger-od/nwjs_chromium.src,PeterWangIntel/chromium-crosswalk,Fireblend/chromium-crosswalk,chuan9/chromium-crosswalk,ltilve/chromium,krieger-od/nwjs_chromium.src,axinging/chromium-crosswalk,krieger-od/nwjs_chromium.src,hgl888/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,ltilve/chromium,dushu1203/chromium.src,dednal/chromium.src,fujunwei/chromium-crosswalk,jaruba/chromium.src,M4sse/chromium.src,Jonekee/chromium.src,M4sse/chromium.src,Jonekee/chromium.src,Pluto-tv/chromium-crosswalk,M4sse/chromium.src,fujunwei/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,M4sse/chromium.src,Pluto-tv/chromium-crosswalk,M4sse/chromium.src,markYoungH/chromium.src,jaruba/chromium.src,fujunwei/chromium-crosswalk,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,Fireblend/chromium-crosswalk,hgl888/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,markYoungH/chromium.src,markYoungH/chromium.src,Fireblend/chromium-crosswalk,ltilve/chromium,jaruba/chromium.src,M4sse/chromium.src,jaruba/chromium.src,dednal/chromium.src,dednal/chromium.src,fujunwei/chromium-crosswalk,chuan9/chromium-crosswalk,fujunwei/chromium-crosswalk,markYoungH/chromium.src,hgl888/chromium-crosswalk,chuan9/chromium-crosswalk,axinging/chromium-crosswalk,markYoungH/chromium.src,TheTypoMaster/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,jaruba/chromium.src,Chilledheart/chromium,TheTypoMaster/chromium-crosswalk,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Fireblend/chromium-crosswalk,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,dednal/chromium.src,ltilve/chromium,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,hgl888/chromium-crosswalk,markYoungH/chromium.src,krieger-od/nwjs_chromium.src,dednal/chromium.src,jaruba/chromium.src,Chilledheart/chromium,Pluto-tv/chromium-crosswalk,jaruba/chromium.src,dushu1203/chromium.src,mohamed--abdel-maksoud/chromium.src,axinging/chromium-crosswalk,Pluto-tv/chromium-crosswalk,fujunwei/chromium-crosswalk,hgl888/chromium-crosswalk,dushu1203/chromium.src,M4sse/chromium.src,Just-D/chromium-1,ltilve/chromium,dednal/chromium.src,mohamed--abdel-maksoud/chromium.src,ltilve/chromium,dednal/chromium.src,Just-D/chromium-1,dushu1203/chromium.src,Just-D/chromium-1,jaruba/chromium.src,Jonekee/chromium.src,fujunwei/chromium-crosswalk,Fireblend/chromium-crosswalk,dushu1203/chromium.src,mohamed--abdel-maksoud/chromium.src,Jonekee/chromium.src,M4sse/chromium.src,axinging/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,jaruba/chromium.src,Just-D/chromium-1,Just-D/chromium-1,axinging/chromium-crosswalk,krieger-od/nwjs_chromium.src,Jonekee/chromium.src,axinging/chromium-crosswalk,dednal/chromium.src,Just-D/chromium-1,hgl888/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,dushu1203/chromium.src,Fireblend/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,krieger-od/nwjs_chromium.src,PeterWangIntel/chromium-crosswalk,M4sse/chromium.src,chuan9/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,Pluto-tv/chromium-crosswalk,markYoungH/chromium.src,dushu1203/chromium.src,PeterWangIntel/chromium-crosswalk,Chilledheart/chromium,jaruba/chromium.src,ltilve/chromium,Jonekee/chromium.src,TheTypoMaster/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,krieger-od/nwjs_chromium.src,Jonekee/chromium.src,dednal/chromium.src,mohamed--abdel-maksoud/chromium.src,fujunwei/chromium-crosswalk,chuan9/chromium-crosswalk,hgl888/chromium-crosswalk,Chilledheart/chromium,ltilve/chromium,Fireblend/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,axinging/chromium-crosswalk,jaruba/chromium.src,axinging/chromium-crosswalk,Jonekee/chromium.src,markYoungH/chromium.src,PeterWangIntel/chromium-crosswalk,krieger-od/nwjs_chromium.src,dushu1203/chromium.src,dushu1203/chromium.src,Chilledheart/chromium,PeterWangIntel/chromium-crosswalk,krieger-od/nwjs_chromium.src,axinging/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,dushu1203/chromium.src,axinging/chromium-crosswalk,Chilledheart/chromium,TheTypoMaster/chromium-crosswalk