Modified default blacklist regexp to match nothing, as empty regexp was matching everything. See http://stackoverflow.com/questions/940822/regular-expression-syntax-for-match-nothing/940856 .
Modified default blacklist regexp to match nothing, as empty regexp
was matching everything. See
http://stackoverflow.com/questions/940822/regular-expression-syntax-for-match-nothing/940856 .

Review URL: http://codereview.chromium.org/601064

git-svn-id: fd409f4bdeea2bb50a5d34bb4d4bfc2046a5a3dd@38965 0039d316-1c4b-4281-b951-d872f2087c98

liaorubei/depot_tools,Chilledheart/depot_tools,Phonebooth/depot_tools,Chilledheart/depot_tools,ajohnson23/depot_tools,chinmaygarde/depot_tools,disigma/depot_tools,hsharsha/depot_tools,coreos/depot_tools,Midrya/chromium,CoherentLabs/depot_tools,disigma/depot_tools,Midrya/chromium,michalliu/chromium-depot_tools,duanwujie/depot_tools,azureplus/chromium_depot_tools,G-P-S/depot_tools,xuyuhan/depot_tools,primiano/depot_tools,G-P-S/depot_tools,npe9/depot_tools,fanjunwei/depot_tools,fracting/depot_tools,xuyuhan/depot_tools,aleonliao/depot_tools,azunite/chrome_build,sarvex/depot-tools,azunite/chrome_build,yetu/repotools,cpanelli/-git-clone-https-chromium.googlesource.com-chromium-tools-depot_tools,cpanelli/-git-clone-https-chromium.googlesource.com-chromium-tools-depot_tools,duongbaoduy/gtools,HackFisher/depot_tools,fanjunwei/depot_tools,azunite/chrome_build,yetu/repotools,Phonebooth/depot_tools,eatbyte/depot_tools,npe9/depot_tools,Neozaru/depot_tools,HackFisher/depot_tools,Chilledheart/depot_tools,yetu/repotools,withtone/depot_tools,primiano/depot_tools,sarvex/depot-tools,airtimemedia/depot_tools,fanjunwei/depot_tools,michalliu/chromium-depot_tools,gcodetogit/depot_tools,fracting/depot_tools,G-P-S/depot_tools,aleonliao/depot_tools,CoherentLabs/depot_tools,mlufei/depot_tools,azureplus/chromium_depot_tools,cybertk/depot_tools,eatbyte/depot_tools,kromain/chromium-tools,fracting/depot_tools,primiano/depot_tools,smikes/depot_tools,sarvex/depot-tools,coreos/depot_tools,airtimemedia/depot_tools,aleonliao/depot_tools,xuyuhan/depot_tools,ajohnson23/depot_tools,duongbaoduy/gtools,hsharsha/depot_tools,xuyuhan/depot_tools,mlufei/depot_tools,gcodetogit/depot_tools,azureplus/chromium_depot_tools,G-P-S/depot_tools,Chilledheart/depot_tools,Midrya/chromium,kromain/chromium-tools,michalliu/chromium-depot_tools,HackFisher/depot_tools,airtimemedia/depot_tools,smikes/depot_tools,jankeromnes/depot_tools,HackFisher/depot_tools,jankeromnes/depot_tools,cpanelli/-git-clone-https-chromium.googlesource.com-chromium-tools-depot_tools,kromain/chromium-tools,chinmaygarde/depot_tools,fanjunwei/depot_tools,withtone/depot_tools,cybertk/depot_tools,cybertk/depot_tools,npe9/depot_tools,jankeromnes/depot_tools,liaorubei/depot_tools,Neozaru/depot_tools,Phonebooth/depot_tools,airtimemedia/depot_tools,jankeromnes/depot_tools,npe9/depot_tools,kaiix/depot_tools,Chilledheart/depot_tools,michalliu/chromium-depot_tools,Neozaru/depot_tools,smikes/depot_tools,SuYiling/chrome_depot_tools,jankeromnes/depot_tools,Phonebooth/depot_tools,coreos/depot_tools,sarvex/depot-tools,cybertk/depot_tools,disigma/depot_tools,SuYiling/chrome_depot_tools,liaorubei/depot_tools,ajohnson23/depot_tools,kaiix/depot_tools,coreos/depot_tools,coreos/depot_tools,eatbyte/depot_tools,smikes/depot_tools,cybertk/depot_tools,eatbyte/depot_tools,hsharsha/depot_tools,SuYiling/chrome_depot_tools,jankeromnes/depot_tools,chinmaygarde/depot_tools,Neozaru/depot_tools,duanwujie/depot_tools,coreos/depot_tools,gcodetogit/depot_tools,jankeromnes/depot_tools,liaorubei/depot_tools,duongbaoduy/gtools,smikes/depot_tools,mlufei/depot_tools,withtone/depot_tools,duanwujie/depot_tools,kromain/chromium-tools,Neozaru/depot_tools,kaiix/depot_tools