Run install-build-deps in the middle of 'fetch chromium'

fetch.py

 #!/usr/bin/env python
 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 Tool to perform checkouts in one easy command line!
 
 Usage:
   fetch <recipe> [--property=value [--property2=value2 ...]]
@@ skipping 44 matching lines @@
 
   def init(self):
     pass
 
   def sync(self):
     pass
 
   def run(self, cmd, **kwargs):
     print 'Running: %s' % (' '.join(pipes.quote(x) for x in cmd))
     if self.options.dry_run:
-      return 0
+      return ''
     return subprocess.check_output(cmd, **kwargs)
 
 
 class GclientCheckout(Checkout):
 
   def run_gclient(self, *cmd, **kwargs):
     if not spawn.find_executable('gclient'):
       cmd_prefix = (sys.executable, os.path.join(SCRIPT_PATH, 'gclient.py'))
     else:
       cmd_prefix = ('gclient',)
@@ skipping 50 matching lines @@
     gclient_spec = 'solutions = [\n%s\n]\n' % '\n'.join(soln_strings)
     extra_keys = ['target_os', 'target_os_only']
     gclient_spec += ''.join('%s = %s\n' % (key, _format_literal(self.spec[key]))
                              for key in extra_keys if key in self.spec)
     return gclient_spec
 
   def init(self):
     # Configure and do the gclient checkout.
     self.run_gclient('config', '--spec', self._format_spec())
     sync_cmd = ['sync']
-    if self.options.nohooks:
+    if self.options.nohooks or self.spec.get('fetch_hooks'):
       sync_cmd.append('--nohooks')
     if self.options.no_history:
       sync_cmd.append('--no-history')
     if self.spec.get('with_branch_heads', False):
       sync_cmd.append('--with_branch_heads')
     self.run_gclient(*sync_cmd)
 
+    for cmd in self.spec.get('fetch_hooks', []):
+      self.run(cmd)
+    if self.spec.get('fetch_hooks') and not self.options.nohooks:
+      self.run_gclient('runhooks')
+
     # Configure git.
     wd = os.path.join(self.base, self.root)
     if self.options.dry_run:
       print 'cd %s' % wd
     self.run_git(
         'submodule', 'foreach',
         'git config -f $toplevel/.git/config submodule.$name.ignore all',
         cwd=wd)
     self.run_git(
         'config', '--add', 'remote.origin.fetch',
@@ skipping 182 matching lines @@
   spec, root = run_recipe_fetch(recipe, props)
   return run(options, spec, root)
 
 
 if __name__ == '__main__':
   try:
     sys.exit(main())
   except KeyboardInterrupt:
     sys.stderr.write('interrupted\n')
     sys.exit(1)