Switch WebRTC recipe to Git.
Switch WebRTC recipe to Git.

BUG=412012

Review URL: https://codereview.chromium.org/765373002

git-svn-id: fd409f4bdeea2bb50a5d34bb4d4bfc2046a5a3dd@294546 0039d316-1c4b-4281-b951-d872f2087c98

azunite/chrome_build,fracting/depot_tools,aleonliao/depot_tools,duanwujie/depot_tools,mlufei/depot_tools,mlufei/depot_tools,gcodetogit/depot_tools,primiano/depot_tools,duongbaoduy/gtools,kaiix/depot_tools,azureplus/chromium_depot_tools,hsharsha/depot_tools,hsharsha/depot_tools,withtone/depot_tools,sarvex/depot-tools,chinmaygarde/depot_tools,sarvex/depot-tools,duongbaoduy/gtools,npe9/depot_tools,gcodetogit/depot_tools,SuYiling/chrome_depot_tools,ajohnson23/depot_tools,fracting/depot_tools,cpanelli/-git-clone-https-chromium.googlesource.com-chromium-tools-depot_tools,azureplus/chromium_depot_tools,primiano/depot_tools,CoherentLabs/depot_tools,chinmaygarde/depot_tools,gcodetogit/depot_tools,Midrya/chromium,azunite/chrome_build,azureplus/chromium_depot_tools,npe9/depot_tools,duanwujie/depot_tools,liaorubei/depot_tools,sarvex/depot-tools,chinmaygarde/depot_tools,ajohnson23/depot_tools,withtone/depot_tools,kaiix/depot_tools,npe9/depot_tools,npe9/depot_tools,duongbaoduy/gtools,fracting/depot_tools,disigma/depot_tools,sarvex/depot-tools,disigma/depot_tools,hsharsha/depot_tools,disigma/depot_tools,primiano/depot_tools,liaorubei/depot_tools,withtone/depot_tools,liaorubei/depot_tools,aleonliao/depot_tools,SuYiling/chrome_depot_tools,liaorubei/depot_tools,ajohnson23/depot_tools,aleonliao/depot_tools,Midrya/chromium,azunite/chrome_build,kaiix/depot_tools,SuYiling/chrome_depot_tools,Midrya/chromium,mlufei/depot_tools,CoherentLabs/depot_tools,duanwujie/depot_tools,cpanelli/-git-clone-https-chromium.googlesource.com-chromium-tools-depot_tools,cpanelli/-git-clone-https-chromium.googlesource.com-chromium-tools-depot_tools