Remove unused base class Texture methods and make them non-virtual in derived classes
Remove unused base class Texture methods and make them non-virtual in derived classes

Issue=306
Signed-off-by: Nicolas Capens

git-svn-id: a070b70d2b8c44c266a3870c0cddd9a0ee470458@1080 736b8ea6-26fd-11df-bfd4-992fa37f6226

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