Reject non-ASCII characters in shader source at the preprocessor level.
Reject non-ASCII characters in shader source at the preprocessor level.

Review URL: http://codereview.appspot.com/4094047

git-svn-id: a070b70d2b8c44c266a3870c0cddd9a0ee470458@545 736b8ea6-26fd-11df-bfd4-992fa37f6226

pombreda/angleproject,ecoal95/angle,mybios/angle,vvuk/angle-old,vvuk/angle,bsergean/angle,stammen/angleproject,crezefire/angle,cvsuser-chromium/chromium-third-party_angle_dx11,vvuk/angle,MIPS/external-chromium_org-third_party-angle_dx11,ghostoy/angle,csa7mdm/angle,mybios/angle,nandhanurrevanth/angle,mlfarrell/angle,ehsan/angle,KTXSoftware/angleproject,domokit/waterfall,xuxiandi/angleproject,csa7mdm/angle,jgcaaprom/android_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle_dx11,MIPS/external-chromium_org-third_party-angle_dx11,xuxiandi/angleproject,RepublicMaster/angleproject,crezefire/angle,mikolalysenko/angle,KalebDark/angleproject,ecoal95/angle,mrobinson/rust-angle,MSOpenTech/angle,shairai/angleproject,xin3liang/platform_external_chromium_org_third_party_angle_dx11,mrobinson/rust-angle,mybios/angle,ecoal95/angle,stammen/angleproject,cvsuser-chromium/chromium-third-party_angle_dx11,android-ia/platform_external_chromium_org_third_party_angle_dx11,xin3liang/platform_external_chromium_org_third_party_angle,KalebDark/angleproject,csa7mdm/angle,bsergean/angle,MSOpenTech/angle-win8.0,shairai/angleproject,jgcaaprom/android_external_chromium_org_third_party_angle,pombreda/angleproject,android-ia/platform_external_chromium_org_third_party_angle_dx11,MSOpenTech/angle-win8.0,bsergean/angle,android-ia/platform_external_chromium_org_third_party_angle,larsbergstrom/angle,mikolalysenko/angle,nandhanurrevanth/angle,MSOpenTech/angle-win8.0,mikolalysenko/angle,crezefire/angle,themusicgod1/angleproject,MSOpenTech/angle,shairai/angleproject,mikolalysenko/angle,vvuk/angle-old,larsbergstrom/angle,nandhanurrevanth/angle,android-ia/platform_external_chromium_org_third_party_angle,jgcaaprom/android_external_chromium_org_third_party_angle,ghostoy/angle,android-ia/platform_external_chromium_org_third_party_angle,ppy/angle,xin3liang/platform_external_chromium_org_third_party_angle,cvsuser-chromium/chromium-third-party_angle_dx11,ehsan/angle,ppy/angle,vvuk/angle,android-ia/platform_external_chromium_org_third_party_angle_dx11,cantren/angleproject,mlfarrell/angle,android-ia/platform_external_chromium_org_third_party_angle_dx11,xin3liang/platform_external_chromium_org_third_party_angle,ghostoy/angle,larsbergstrom/angle,MSOpenTech/angle,nandhanurrevanth/angle,ecoal95/angle,shairai/angleproject,csa7mdm/angle,cantren/angleproject,mybios/angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,themusicgod1/angleproject,cvsuser-chromium/chromium-third-party_angle_dx11,mrobinson/rust-angle,ehsan/angle,MIPS/external-chromium_org-third_party-angle,MIPS/external-chromium_org-third_party-angle_dx11,vvuk/angle-old,xin3liang/platform_external_chromium_org_third_party_angle_dx11,KalebDark/angleproject,cantren/angleproject,bsergean/angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,crezefire/angle,KTXSoftware/angleproject,jgcaaprom/android_external_chromium_org_third_party_angle,KalebDark/angleproject,xin3liang/platform_external_chromium_org_third_party_angle,KTXSoftware/angleproject,MIPS/external-chromium_org-third_party-angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle,stammen/angleproject,ppy/angle,MSOpenTech/angle,stammen/angleproject,larsbergstrom/angle,RepublicMaster/angleproject,xuxiandi/angleproject,mlfarrell/angle,xin3liang/platform_external_chromium_org_third_party_angle_dx11,geekboxzone/lollipop_external_chromium_org_third_party_angle,ppy/angle,mrobinson/rust-angle,mrobinson/rust-angle,RepublicMaster/angleproject,pombreda/angleproject,KTXSoftware/angleproject,xuxiandi/angleproject,KTXSoftware/angleproject,RepublicMaster/angleproject,ghostoy/angle,cantren/angleproject,vvuk/angle-old,MIPS/external-chromium_org-third_party-angle,android-ia/platform_external_chromium_org_third_party_angle,vvuk/angle,xin3liang/platform_external_chromium_org_third_party_angle_dx11,themusicgod1/angleproject,MSOpenTech/angle-win8.0,domokit/waterfall,ehsan/angle,themusicgod1/angleproject,mlfarrell/angle,ecoal95/angle,pombreda/angleproject