(Landing this on behalf of groby@chromium.org.  Review the CL at http://codereview.appspot.com/5482053/)
(Landing this on behalf of groby@chromium.org.  Review the CL at http://codereview.appspot.com/5482053/)

Fix issue-242 (failure to compile any shader using cos() with
SH_EMULATE_BUILT_IN_FUNCTIONS)

ANGLEBUG=242

git-svn-id: a070b70d2b8c44c266a3870c0cddd9a0ee470458@910 736b8ea6-26fd-11df-bfd4-992fa37f6226

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