UserAgent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0

Steps to reproduce the problem:
1. Downloaded the cromium code  git clone https://chromium.googlesource.com/chromium/src
2. git checkout 43.0.2357.81
3. Install gyp
4. build/gyp_chromium

What is the expected behavior?
After running build/gyp_chromium it should have come out successfully but instead of that it was throwing error

What went wrong?
 ./build/gyp_chromium

Updating projects from gyp files...
gyp: /home/cdm_test/chrome/src/third_party/webrtc/tools/tools.gyp not found (cwd: /home/cdm_test/chrome/src)
gyp: /home/cdm_test/chrome/src/v8/src/d8.gyp not found (cwd: /home/cdm_test/chrome/src)
gyp: /home/cdm_test/chrome/src/native_client/build/untrusted.gypi not found (cwd: /home/cdm_test/chrome/src) while reading includes of /home/cdm_test/chrome/src/build/common_untrusted.gypi while reading includes of /home/cdm_test/chrome/src/mojo/mojo_nacl_untrusted.gyp
gyp: Error importing pymod_do_mainmodule (grit_info): No module named grit_info
gyp: /home/cdm_test/chrome/src/third_party/libaddressinput/src/cpp/libaddressinput.gypi not found (cwd: /home/cdm_test/chrome/src) while reading includes of /home/cdm_test/chrome/src/third_party/libaddressinput/libaddressinput.gyp
Exception: '/home/cdm_test/chrome/src/native_client/build/untrusted.gypi'
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/gyp-0.1-py2.7.egg/gyp/input.py", line 497, in CallLoadTargetBuildFile
    includes, depth, check, False)
  File "/usr/local/lib/python2.7/dist-packages/gyp-0.1-py2.7.egg/gyp/input.py", line 402, in LoadTargetBuildFile
    included = GetIncludedBuildFiles(build_file_path, aux_data)
  File "/usr/local/lib/python2.7/dist-packages/gyp-0.1-py2.7.egg/gyp/input.py", line 172, in GetIncludedBuildFiles
    GetIncludedBuildFiles(included_build_file, aux_data, included)
  File "/usr/local/lib/python2.7/dist-packages/gyp-0.1-py2.7.egg/gyp/input.py", line 172, in GetIncludedBuildFiles
    GetIncludedBuildFiles(included_build_file, aux_data, included)
  File "/usr/local/lib/python2.7/dist-packages/gyp-0.1-py2.7.egg/gyp/input.py", line 172, in GetIncludedBuildFiles
    GetIncludedBuildFiles(included_build_file, aux_data, included)
  File "/usr/local/lib/python2.7/dist-packages/gyp-0.1-py2.7.egg/gyp/input.py", line 171, in GetIncludedBuildFiles
    for included_build_file in aux_data[build_file_path].get('included', []):
KeyError: '/home/cdm_test/chrome/src/native_client/build/untrusted.gypi'

Package nss was not found in the pkg-config search path.
Perhaps you should add the directory containing `nss.pc'
to the PKG_CONFIG_PATH environment variable
No package 'nss' found
gyp: Call to 'pkg-config --libs-only-l nss | sed -e "s/-lssl3//"' returned exit status 0 while in /home/cdm_test/chrome/src/net/third_party/nss/ssl.gyp.
gyp: /home/cdm_test/chrome/src/third_party/libjpeg_turbo/libjpeg.gyp not found (cwd: /home/cdm_test/chrome/src)
gyp: /home/cdm_test/chrome/src/v8/tools/gyp/v8.gyp not found (cwd: /home/cdm_test/chrome/src)
gyp: /home/cdm_test/chrome/src/third_party/pdfium/samples/samples.gyp not found (cwd: /home/cdm_test/chrome/src)
gyp: /home/cdm_test/chrome/src/third_party/ffmpeg/ffmpeg.gyp not found (cwd: /home/cdm_test/chrome/src)
gyp: /home/cdm_test/chrome/src/third_party/WebKit/public/all.gyp not found (cwd: /home/cdm_test/chrome/src)
gyp: /home/cdm_test/chrome/src/third_party/skia/gyp/core.gypi not found (cwd: /home/cdm_test/chrome/src) while reading includes of /home/cdm_test/chrome/src/skia/skia_library.gypi while reading includes of /home/cdm_test/chrome/src/skia/skia.gyp
/bin/sh: 1: cups-config: not found
gyp: Call to 'cups-config --api-version' returned exit status 127 while in /home/cdm_test/chrome/src/printing/printing.gyp.
Package libpulse was not found in the pkg-config search path.
Perhaps you should add the directory containing `libpulse.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libpulse' found
gyp: Call to 'pkg-config --cflags libpulse' returned exit status 1 while in /home/cdm_test/chrome/src/media/media.gyp.
gyp: /home/cdm_test/chrome/src/third_party/angle/build/common_defines.gypi not found (cwd: /home/cdm_test/chrome/src) while reading includes of /home/cdm_test/chrome/src/gpu/gpu.gyp
gyp: Error importing pymod_do_mainmodule (grit_info): No module named grit_info
gyp: /home/cdm_test/chrome/src/third_party/icu/icu.gyp not found (cwd: /home/cdm_test/chrome/src)
gyp: Error importing pymod_do_mainmodule (grit_info): No module named grit_info
gyp: Error importing pymod_do_mainmodule (grit_info): No module named grit_info
gyp: Error importing pymod_do_mainmodule (grit_info): No module named grit_info

Did this work before? N/A 

Chrome version: <Copy from: 'about:version'>  Channel: stable
OS Version: ubuntu 14.4
Flash Version: 43.0.2357.81

Please help me out to build this chromium on ubuntu 14.04