Fixing Coverity bugs (DEAD_CODE and PASS_BY_VALUE)

CIDs 16230, 16439, 16610, 16635

BUG=NONE
TEST=NONE

Review URL: http://codereview.chromium.org/7215029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@90134 0039d316-1c4b-4281-b951-d872f2087c98
TransportTexture::TransportTexture(GpuChannel* channel,
                                   IPC::Message::Sender* sender,
                                   gpu::gles2::GLES2Decoder* decoder,
                                   int32 host_id,
                                   int32 route_id)
  : channel_(channel),
    sender_(sender),
    decoder_(decoder),
    host_id_(host_id),
    route_id_(route_id),
    output_textures_(NULL) {
}

TransportTexture::TransportTexture(GpuChannel* channel,
                                   IPC::Message::Sender* sender,
                                   gpu::gles2::GLES2Decoder* decoder,
                                   int32 host_id,
                                   int32 route_id)
  : channel_(channel),
    sender_(sender),
    decoder_(decoder),
    host_id_(host_id),
    route_id_(route_id),
    output_textures_(NULL) {
}
