UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36

Steps to reproduce the problem:
1. gclient sync
2. gclient sync
3. gclient

What is the expected behavior?
should be successfully downloaded

What went wrong?
Error: Command '/usr/bin/python src/build/linux/sysroot_scripts/install-sysroot.py --running-as-hook' returned non-zero exit status 1 in /home/user/webrtc/src/chromium
Installing Debian Wheezy amd64 root image: /home/user/webrtc/src/chromium/src/build/linux/debian_wheezy_amd64-sysroot
Downloading https://commondatastorage.googleapis.com/chrome-linux-sysroot/toolchain/c52471d9dec240c8d0a88fa98aa1eefeee32e22f/debian_wheezy_amd64_sysroot.tgz
Traceback (most recent call last):
  File "src/build/linux/sysroot_scripts/install-sysroot.py", line 232, in <module>
    sys.exit(main(sys.argv[1:]))
  File "src/build/linux/sysroot_scripts/install-sysroot.py", line 153, in main
    InstallDefaultSysroots()
  File "src/build/linux/sysroot_scripts/install-sysroot.py", line 127, in InstallDefaultSysroots
    InstallSysroot(host_arch)
  File "src/build/linux/sysroot_scripts/install-sysroot.py", line 218, in InstallSysroot
    ['curl', '--fail', '--retry', '3', '-L', url, '-o', tarball])
  File "/usr/lib/python2.7/subprocess.py", line 535, in check_call
    retcode = call(*popenargs, **kwargs)
  File "/usr/lib/python2.7/subprocess.py", line 522, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory
Error: Command '/usr/bin/python -u src/sync_chromium.py --target-revision 039ff70eec6f7b92e993504d7a5a031a8a69b706' returned non-zero exit status 2 in /home/user/webrtc
Hook '/usr/bin/python -u src/sync_chromium.py --target-revision 039ff70eec6f7b92e993504d7a5a031a8a69b706' took 664.00 secs

Did this work before? N/A 

Chrome version: 50.0.2661.102  Channel: stable
OS Version: 
Flash Version: Shockwave Flash 22.0 r0

OS: Linux Mint
I have installed required software chromium depot tool and then fetch --nohooks webrtc-android.
while issuing this command - gclient sync ,reports error.

________ running '/usr/bin/python src/build/linux/sysroot_scripts/install-sysroot.py --running-as-hook' in '/home/user/webrtc/src/chromium'
Error: Command '/usr/bin/python src/build/linux/sysroot_scripts/install-sysroot.py --running-as-hook' returned non-zero exit status 1 in /home/user/webrtc/src/chromium
Installing Debian Wheezy amd64 root image: /home/user/webrtc/src/chromium/src/build/linux/debian_wheezy_amd64-sysroot
Downloading https://commondatastorage.googleapis.com/chrome-linux-sysroot/toolchain/c52471d9dec240c8d0a88fa98aa1eefeee32e22f/debian_wheezy_amd64_sysroot.tgz
Traceback (most recent call last):
  File "src/build/linux/sysroot_scripts/install-sysroot.py", line 232, in <module>
    sys.exit(main(sys.argv[1:]))
  File "src/build/linux/sysroot_scripts/install-sysroot.py", line 153, in main
    InstallDefaultSysroots()
  File "src/build/linux/sysroot_scripts/install-sysroot.py", line 127, in InstallDefaultSysroots
    InstallSysroot(host_arch)
  File "src/build/linux/sysroot_scripts/install-sysroot.py", line 218, in InstallSysroot
    ['curl', '--fail', '--retry', '3', '-L', url, '-o', tarball])
  File "/usr/lib/python2.7/subprocess.py", line 535, in check_call
    retcode = call(*popenargs, **kwargs)
  File "/usr/lib/python2.7/subprocess.py", line 522, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory
Error: Command '/usr/bin/python -u src/sync_chromium.py --target-revision 039ff70eec6f7b92e993504d7a5a031a8a69b706' returned non-zero exit status 2 in /home/user/webrtc
Hook '/usr/bin/python -u src/sync_chromium.py --target-revision 039ff70eec6f7b92e993504d7a5a031a8a69b706' took 664.00 secs