Fix clang warning: ConstantUnion.h:56:17: warning: 7 enumeration values not handled in switch
Fix clang warning: ConstantUnion.h:56:17: warning: 7 enumeration values not handled in switch

Issue=124

Part 1 of 5: <http://webkit.org/b/56337> Enable -Werror on ANGLE

Signed-off-by: Nicolas Capens
Signed-off-by: Daniel Koch

Upstream bug: <http://code.google.com/p/angleproject/issues/detail?id=124>

Fixes the following static analyzer warning:

    In file included from src/compiler/debug.cpp:14:
    In file included from src/compiler/ParseHelper.h:10:
    In file included from src/compiler/localintermediate.h:11:
    In file included from src/compiler/intermediate.h:21:
    src/compiler/ConstantUnion.h:56:17: warning: 7 enumeration values not handled in switch: 'EbtVoid', 'EbtGuardSamplerBegin', 'EbtSampler2D'... [-Wswitch-enum,2]
             switch (type) {
                     ^

* src/compiler/ConstantUnion.h:
(ConstantUnion::operator==): Added a default case.

Author:    David Kilzer <ddkilzer@apple.com>

git-svn-id: a070b70d2b8c44c266a3870c0cddd9a0ee470458@572 736b8ea6-26fd-11df-bfd4-992fa37f6226

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