partitioning - Data Recovery - ChromiumOS reformats drive

System: EeePc 1015pem
hard drive size: 320 GB

Before Chromium install:

1 recovery partition - Windows 7 starter.

1 NTFS for Windows 7.

1 EFI partition for boot booster.

The remaining drive, converted into extended --> 1 NTFS + 1 ext4 + 1 swap

I was trying out chrome in a pen drive. When selected Upgrade in the shell, it wiped my whole 320GB drive and created two large partitions and many smaller ones.

Running TestDisk:

Disk /dev/sda - 320 GB / 298 GiB - CHS 38914 255 63

      Partition               Start        End    Size in sectors
 P HPFS - NTFS              0  32 33 13054  75 13  209715200
 D FAT16 <32M              15 140 62    17 151  6      32768 <-- chromium created
 D Linux                   17 151  7 38390 250  4  616468480 <-- chromium created
 P HPFS - NTFS          15012 107  8 38910 152 26  383924224
 D Linux Swap           38589 184 60 38718 252 46    2076656 <-- chromium created
 D Linux                38652  16 21 38760 108  4    1740800 [C-ROOT] <-- chromium created

Choosing to list files says, "Can't open filesystem. Filesystem seems damaged.
"

Is it still possible to recover? How?