Fix SafeAdd and SafeMultiply

BUG=145648,145544


Review URL: https://chromiumcodereview.appspot.com/10916165

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@155478 0039d316-1c4b-4281-b951-d872f2087c98
RenderBuffer::RenderBuffer(GLES2DecoderImpl* decoder)
    : decoder_(decoder),
      memory_tracker_(decoder->GetContextGroup()->memory_tracker(),
                      NULL, NULL),
      id_(0) {
}

RenderBuffer::RenderBuffer(GLES2DecoderImpl* decoder)
    : decoder_(decoder),
      memory_tracker_(decoder->GetContextGroup()->memory_tracker(),
                      NULL, NULL),
      id_(0) {
}
