Push API: Add temporary debug log to track down crash
Push API: Add temporary debug log to track down crash

Specifically, for https://goto.google.com/gcmdriver-already-instantiated

Sample output:
[FATAL:gcm_profile_service.cc(155)] An instance of GCMProfileService already exists! Old profile: 0x9e9d75c0 Default 0 0 1 13065207799278578, new profile: 0x9e9d75c0 Default 0 0 1 13065207799278578

BUG=437827

Committed: https://crrev.com/934554c3f369c9821b0af3ae8a09ed55f29eafc9
Cr-Commit-Position: refs/heads/master@{#310593}

Review URL: https://codereview.chromium.org/846473003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#310760}

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