Wrap download_from_google_storage.py in a cwd-independent script

DEPS

 # This file is automatically processed to create .DEPS.git which is the file
 # that gclient uses under git.
 #
 # See http://code.google.com/p/chromium/wiki/UsingGit
 #
 # To test manually, run:
 #   python tools/deps2git/deps2git.py -o .DEPS.git -w <gclientdir>
 # where <gcliendir> is the absolute path to the directory containing the
 # .gclient file (the parent of 'src').
 #
@@ skipping 192 matching lines @@
     # src/tools/export_tarball - please keep them in sync.
     'name': 'lastchange',
     'pattern': '.',
     'action': ['python', 'src/build/util/lastchange.py',
                '-o', 'src/build/util/LASTCHANGE'],
   },
   # Pull GN binaries. This needs to be before running GYP below.
   {
     'name': 'gn_linux64',
     'pattern': '.',
-    'action': [ 'download_from_google_storage',
+    'action': [ 'src/tools/download_from_google_storage.py',
                 '--no_resume',

[viettrungluu, 2015/10/28 22:37:33]

I wonder if we shouldn't include "--no_resume", "--quiet", "--no_auth"
automatically in our wrapper.

                 '--quiet',
                 '--platform=linux*',
                 '--no_auth',
                 '--bucket', 'chromium-gn',
                 '-s', 'src/buildtools/linux64/gn.sha1',
     ],
   },
   {
     'name': 'gn_mac',
     'pattern': '.',
-    'action': [ 'download_from_google_storage',
+    'action': [ 'src/tools/download_from_google_storage.py',
                 '--no_resume',
                 '--quiet',
                 '--platform=darwin',
                 '--no_auth',
                 '--bucket', 'chromium-gn',
                 '-s', 'src/buildtools/mac/gn.sha1',
     ],
   },
   {
     'name': 'gn_win',
     'pattern': '.',
-    'action': [ 'download_from_google_storage',
+    'action': [ 'src/tools/download_from_google_storage.py',
                 '--no_resume',
                 '--quiet',
                 '--platform=win*',
                 '--no_auth',
                 '--bucket', 'chromium-gn',
                 '-s', 'src/buildtools/win/gn.exe.sha1',
     ],
   },
   # Pull clang-format binaries using checked-in hashes.
   {
     'name': 'clang_format_linux',
     'pattern': '.',
-    'action': [ 'download_from_google_storage',
+    'action': [ 'src/tools/download_from_google_storage.py',
                 '--no_resume',
                 '--quiet',
                 '--platform=linux*',
                 '--no_auth',
                 '--bucket', 'chromium-clang-format',
                 '-s', 'src/buildtools/linux64/clang-format.sha1',
     ],
   },
   {
     'name': 'clang_format_mac',
     'pattern': '.',
-    'action': [ 'download_from_google_storage',
+    'action': [ 'src/tools/download_from_google_storage.py',
                 '--no_resume',
                 '--quiet',
                 '--platform=darwin',
                 '--no_auth',
                 '--bucket', 'chromium-clang-format',
                 '-s', 'src/buildtools/mac/clang-format.sha1',
     ],
   },
   # Pull binutils for linux, enabled debug fission for faster linking /
   # debugging when used with clang on Ubuntu Precise.
   # https://code.google.com/p/chromium/issues/detail?id=352046
   {
     'name': 'binutils',
     'pattern': 'src/third_party/binutils',
     'action': [
         'python',
         'src/third_party/binutils/download.py',
     ],
   },
   # Pull eu-strip binaries using checked-in hashes.
   {
     'name': 'eu-strip',
     'pattern': '.',
-    'action': [ 'download_from_google_storage',
+    'action': [ 'src/tools/download_from_google_storage.py',
                 '--no_resume',
                 '--quiet',
                 '--platform=linux*',
                 '--no_auth',
                 '--bucket', 'chromium-eu-strip',
                 '-s', 'src/build/linux/bin/eu-strip.sha1',
     ],
   },
   # Pull the prebuilt network service binaries according to
   # mojo/public/tools/NETWORK_SERVICE_VERSION.
@@ skipping 34 matching lines @@
     'name': 'gotools',
     'pattern': '.',
     'action': [
         'python', 'src/tools/go/download.py',
     ],
   },
   # Pull DejaVu fonts using checked-in hashes.
   {
     'name': 'dejavu-fonts',
     'pattern': '',
-    'action': [ 'download_from_google_storage',
+    'action': [ 'src/tools/download_from_google_storage.py',
                 '--no_resume',
                 '--quiet',
                 '--no_auth',
                 '--bucket', 'mojo/dejavu-fonts',
                 '-s', 'src/third_party/dejavu-fonts-ttf-2.34/ttf/DejaVuSansMono.ttf.sha1',
     ],
   },
   # Pull keyboard_native resources using checked-in hashes.
   {
     'name': 'keyboard_native_resources',
     'pattern': '',
-    'action': [ 'download_from_google_storage',
+    'action': [ 'src/tools/download_from_google_storage.py',
                 '--no_resume',
                 '--quiet',
                 '--no_auth',
                 '--bucket', 'mojo/keyboard_native',
                 '-d', 'src/services/keyboard_native/res',
     ],
   },
   # Pull dump_syms resources using checked-in hashes.
   {
     'name': 'dump_syms_linux64',
     'pattern': '.',
-    'action': [ 'download_from_google_storage',
+    'action': [ 'src/tools/download_from_google_storage.py',
                 '--no_resume',
                 '--quiet',
                 '--platform=linux*',
                 '--no_auth',
                 '--bucket', 'mojo',
                 '-s', 'src/mojo/tools/linux64/dump_syms.sha1',
     ],
   },
   # Pull symupload resources using checked-in hashes.
   {
     'name': 'symupload_linux64',
     'pattern': '.',
-    'action': [ 'download_from_google_storage',
+    'action': [ 'src/tools/download_from_google_storage.py',
                 '--no_resume',
                 '--quiet',
                 '--platform=linux*',
                 '--no_auth',
                 '--bucket', 'mojo',
                 '-s', 'src/mojo/tools/linux64/symupload.sha1',
         ],
   },
   # Pull prediction resources using checked-in hashes.
   {
     'name': 'prediction_resources',
     'pattern': '',
-    'action': [ 'download_from_google_storage',
+    'action': [ 'src/tools/download_from_google_storage.py',
                 '--no_resume',
                 '--quiet',
                 '--no_auth',
                 '--bucket', 'mojo/prediction',
                 '-d', 'src/services/prediction/res',
     ],
   },
 ]