Switching scons to read-only copy, and pinning revision (as its dropped out of the source tree).
Switching scons to read-only copy, and pinning revision (as its dropped
out of the source tree).

BUG=None
TEST=None
TBR=sgk

Review URL: http://codereview.chromium.org/5688002

git-svn-id: e7e1075985beda50ea81ac4472467b4f6e91fc78@862 78cadc50-ecff-11dd-a971-7dbc132099af

luvit/gyp,tarc/gyp,tarc/gyp,mapbox/gyp,pandaxcl/gyp,ryfx/gyp,okwasi/gyp,springmeyer/gyp,erikge/watch_gyp,mkrautz/gyp-libmumble,xin3liang/platform_external_chromium_org_tools_gyp,bnoordhuis/gyp,omasanori/gyp,azunite/gyp,xin3liang/platform_external_chromium_org_tools_gyp,adblockplus/gyp,Chilledheart/gyp,MIPS/external-chromium_org-tools-gyp,MIPS/external-chromium_org-tools-gyp,openpeer/webrtc-gyp,ttyangf/gyp,AWhetter/gyp,Phuehvk/gyp,pyokagan/gyp,clar/gyp,android-ia/platform_external_chromium_org_tools_gyp,trafi/gyp,luvit/gyp,Danath/gyp,yinquan529/platform-external-chromium_org-tools-gyp,bnq4ever/gypgoogle,bnoordhuis/gyp,MIPS/external-chromium_org-tools-gyp,mgamer/gyp,saghul/gyn,AOSPU/external_chromium_org_tools_gyp,Phuehvk/gyp,turbulenz/gyp,msc-/gyp,sport-monkey/GYP,azunite/gyp_20150930,ttyangf/gyp,chromium/gyp,tarc/gyp,clar/gyp,Omegaphora/external_chromium_org_tools_gyp,ttyangf/pdfium_gyp,ryfx/gyp,springmeyer/gyp,cysp/gyp,geekboxzone/lollipop_external_chromium_org_tools_gyp,LazyCodingCat/gyp,AWhetter/gyp,Chilledheart/gyp,channing/gyp,azunite/gyp,channing/gyp,trafi/gyp,msc-/gyp,bpsinc-native/src_tools_gyp,sport-monkey/GYP,Phuehvk/gyp,svn2github/gyp,IllusionRom-deprecated/android_platform_external_chromium_org_tools_gyp,bulldy80/gyp_unofficial,dougbeal/gyp,sdklite/gyp,mapbox/gyp,mkrautz/gyp-libmumble,Omegaphora/external_chromium_org_tools_gyp,enkripsi/gyp,sport-monkey/GYP,openpeer/webrtc-gyp,ryfx/gyp,mgamer/gyp,azunite/gyp,yinquan529/platform-external-chromium_org-tools-gyp,svn2github/kgyp,Chilledheart/gyp,pyokagan/gyp,duanhjlt/gyp,Jack-Q/GYP-copy,cchamberlain/gyp,bulldy80/gyp_unofficial,ttyangf/pdfium_gyp,ttyangf/gyp,clar/gyp,springmeyer/gyp,mistydemeo/gyp,erikge/watch_gyp,lianliuwei/gyp,msc-/gyp,mistydemeo/gyp,dougbeal/gyp,yangrongwei/gyp,omasanori/gyp,enkripsi/gyp,adblockplus/gyp,bnoordhuis/gyp,sloanyang/gyp,luvit/gyp,trafi/gyp,svn2github/kgyp,pandaxcl/gyp,LazyCodingCat/gyp,AWhetter/gyp,lukeweber/gyp-override,sloanyang/gyp,AOSPU/external_chromium_org_tools_gyp,yangrongwei/gyp,AWhetter/gyp,mistydemeo/gyp,Danath/gyp,bnoordhuis/gyp,okumura/gyp,turbulenz/gyp,mapbox/gyp,alexcrichton/gyp,msc-/gyp,svn2github/gyp,Danath/gyp,duanhjlt/gyp,yjhjstz/gyp,msc-/gyp,cysp/gyp,mgamer/gyp,ttyangf/pdfium_gyp,geekboxzone/lollipop_external_chromium_org_tools_gyp,okumura/gyp,dougbeal/gyp,carlTLR/gyp,lukeweber/gyp-override,svn2github/gyp,AOSPU/external_chromium_org_tools_gyp,lianliuwei/gyp,brson/gyp,chromium/gyp,carlTLR/gyp,enkripsi/gyp,cchamberlain/gyp,amoikevin/gyp,mumble-voip/libmumble-gyp,lukeweber/gyp-override,xin3liang/platform_external_chromium_org_tools_gyp,pyokagan/gyp,lianliuwei/gyp,pyokagan/gyp,erikge/watch_gyp,bdarnell/gyp,sdklite/gyp,omasanori/gyp,bnq4ever/gypgoogle,bpsinc-native/src_tools_gyp,alexcrichton/gyp,yjhjstz/gyp,channing/gyp,channing/gyp,bdarnell/gyp,yangrongwei/gyp,duanhjlt/gyp,IllusionRom-deprecated/android_platform_external_chromium_org_tools_gyp,svn2github/kgyp,clar/gyp,tarc/gyp,azunite/gyp_20150930,AOSPU/external_chromium_org_tools_gyp,android-ia/platform_external_chromium_org_tools_gyp,Jack-Q/GYP-copy,Omegaphora/external_chromium_org_tools_gyp,mumble-voip/libmumble-gyp,azunite/gyp_20150930,yjhjstz/gyp,amoikevin/gyp,geekboxzone/lollipop_external_chromium_org_tools_gyp,azunite/gyp_20150930,Chilledheart/gyp,alexcrichton/gyp,yjhjstz/gyp,sanyaade-teachings/gyp,clar/gyp,xin3liang/platform_external_chromium_org_tools_gyp,duanhjlt/gyp,mkrautz/gyp-libmumble,carlTLR/gyp,MIPS/external-chromium_org-tools-gyp,yinquan529/platform-external-chromium_org-tools-gyp,pyokagan/gyp,Jack-Q/GYP-copy,ryfx/gyp,dougbeal/gyp,openpeer/webrtc-gyp,bulldy80/gyp_unofficial,sloanyang/gyp,cchamberlain/gyp,openpeer/webrtc-gyp,Chilledheart/gyp,lukeweber/gyp-override,bnq4ever/gypgoogle,okwasi/gyp,adblockplus/gyp,Omegaphora/external_chromium_org_tools_gyp,mumble-voip/libmumble-gyp,turbulenz/gyp,sanyaade-teachings/gyp,bpsinc-native/src_tools_gyp,ttyangf/pdfium_gyp,Danath/gyp,saghul/gyn,enkripsi/gyp,dougbeal/gyp,erikge/watch_gyp,tarc/gyp,svn2github/kgyp,lianliuwei/gyp,cysp/gyp,bulldy80/gyp_unofficial,springmeyer/gyp,trafi/gyp,bpsinc-native/src_tools_gyp,yjhjstz/gyp,IllusionRom-deprecated/android_platform_external_chromium_org_tools_gyp,Jack-Q/GYP-copy,duanhjlt/gyp,sdklite/gyp,mkrautz/gyp-libmumble,bnq4ever/gypgoogle,brson/gyp,cysp/gyp,brson/gyp,mgamer/gyp,pandaxcl/gyp,Phuehvk/gyp,amoikevin/gyp,sloanyang/gyp,adblockplus/gyp,ttyangf/pdfium_gyp,amoikevin/gyp,svn2github/gyp,mistydemeo/gyp,okumura/gyp,cchamberlain/gyp,Jack-Q/GYP-copy,chromium/gyp,pandaxcl/gyp,carlTLR/gyp,kevinchen3315/gyp-git,bnq4ever/gypgoogle,azunite/gyp,brson/gyp,IllusionRom-deprecated/android_platform_external_chromium_org_tools_gyp,turbulenz/gyp,okwasi/gyp,pandaxcl/gyp,bnoordhuis/gyp,erikge/watch_gyp,Danath/gyp,saghul/gyn,saghul/gyn,springmeyer/gyp,svn2github/kgyp,bdarnell/gyp,yangrongwei/gyp,saghul/gyn,openpeer/webrtc-gyp,yinquan529/platform-external-chromium_org-tools-gyp,kevinchen3315/gyp-git,mapbox/gyp,sanyaade-teachings/gyp,sdklite/gyp,turbulenz/gyp,bdarnell/gyp,ttyangf/gyp,okumura/gyp,ttyangf/gyp,mgamer/gyp,svn2github/gyp,alexcrichton/gyp,adblockplus/gyp,android-ia/platform_external_chromium_org_tools_gyp,bulldy80/gyp_unofficial,ryfx/gyp,mapbox/gyp,azunite/gyp_20150930,sanyaade-teachings/gyp,kevinchen3315/gyp-git,android-ia/platform_external_chromium_org_tools_gyp,kevinchen3315/gyp-git,cysp/gyp,carlTLR/gyp,LazyCodingCat/gyp,sport-monkey/GYP,LazyCodingCat/gyp,enkripsi/gyp,AWhetter/gyp,amoikevin/gyp,geekboxzone/lollipop_external_chromium_org_tools_gyp,omasanori/gyp,luvit/gyp,LazyCodingCat/gyp,cchamberlain/gyp,sport-monkey/GYP,Phuehvk/gyp,azunite/gyp,chromium/gyp,chromium/gyp,sanyaade-teachings/gyp,mumble-voip/libmumble-gyp,okwasi/gyp,trafi/gyp,sdklite/gyp