translate attachment for default Framebuffer when calling getFramebufferAttachmentParameter
translate attachment for default Framebuffer when calling getFramebufferAttachmentParameter

These enums are designed for WebGL 2, they are not valid in GLES. GLES2CmdDecoder in command buffer will report GL_INVALID_ENUM in WebGL conformance test (conformance2/state/gl-object-get-calls.html). Applying this CL to translate them to appropriate values, GL_INVALID_ENUM errors are fixed.

BUG=295792

Review URL: https://codereview.chromium.org/1225143003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@199196 bbb929c8-8fbe-4397-9dbb-9b2b20218538

Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk