Revert "Revert 100494 - Fix bug in SimulateAttrib0."""

TEST=none
BUG=95625
TBR=apatrick@chromium.org

Review URL: http://codereview.chromium.org/7796016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@100507 0039d316-1c4b-4281-b951-d872f2087c98
GLenum GLES2DecoderImpl::PeekGLError() {
  GLenum error = glGetError();
  if (error != GL_NO_ERROR) {
    SetGLError(error, "");
  }
  return error;
}

GLenum GLES2DecoderImpl::PeekGLError() {
  GLenum error = glGetError();
  if (error != GL_NO_ERROR) {
    SetGLError(error, "");
  }
  return error;
}
