Merge "adb: improve CHECKs."

    D("UsbReadMessage");

    size_t usb_packet_size = usb_get_max_packet_size(h);

    CHECK(usb_packet_size >= sizeof(*msg));

    CHECK(usb_packet_size < 4096);

    CHECK_GE(usb_packet_size, sizeof(*msg));

    CHECK_LT(usb_packet_size, 4096ULL);

    char buffer[4096];

    int n = usb_read(h, buffer, usb_packet_size);

    D("UsbReadPayload(%d)", p->msg.data_length);

    size_t usb_packet_size = usb_get_max_packet_size(h);

    CHECK(sizeof(p->data) % usb_packet_size == 0);

    CHECK_EQ(0ULL, sizeof(p->data) % usb_packet_size);

    // Round the data length up to the nearest packet size boundary.

    // The device won't send a zero packet for packet size aligned payloads,

    if (rem_size) {

        len += usb_packet_size - rem_size;

    }

    CHECK(len <= sizeof(p->data));

    CHECK_LE(len, sizeof(p->data));

    return usb_read(h, &p->data, len);

}