[ycm] The YouCompleteMe configuration is not VIM specific.

tools/vim/ninja-build.vim

 " Copyright (c) 2015 the V8 project authors. All rights reserved.
 " Use of this source code is governed by a BSD-style license that can be
 " found in the LICENSE file.
 "
 " Adds a "Compile this file" function, using ninja. On Mac, binds Cmd-k to
 " this command. On Windows, Ctrl-F7 (which is the same as the VS default).
 " On Linux, <Leader>o, which is \o by default ("o"=creates .o files)
 "
 " Adds a "Build this target" function, using ninja. This is not bound
 " to any key by default, but can be used via the :CrBuild command.
@@ skipping 29 matching lines @@
   while candidate and not all(
       [os.path.isdir(os.path.join(candidate, fp)) for fp in fingerprints]):
     candidate = os.path.dirname(candidate)
   return candidate
 
 
 def path_to_build_dir(configuration):
   """Returns <v8_root>/<output_dir>/(Release|Debug)."""
 
   v8_root = path_to_source_root()
-  sys.path.append(os.path.join(v8_root, 'tools', 'vim'))
+  sys.path.append(os.path.join(v8_root, 'tools', 'ninja'))
   from ninja_output import GetNinjaOutputDirectory
   return GetNinjaOutputDirectory(v8_root, configuration)
 
 
 def compute_ninja_command_for_targets(targets='', configuration=None):
   flags = []
   if "use_goma=1" in os.getenv('GYP_DEFINES', '').split(' '):
     flags = ['-j', '512']
   build_dir = path_to_build_dir(configuration);
   build_cmd = ' '.join(['ninja'] + flags + ['-C', build_dir, targets])
@@ skipping 49 matching lines @@
 
 if has('mac')
   map <D-k> :CrCompileFile<cr>
   imap <D-k> <esc>:CrCompileFile<cr>
 elseif has('win32')
   map <C-F7> :CrCompileFile<cr>
   imap <C-F7> <esc>:CrCompileFile<cr>
 elseif has('unix')
   map <Leader>o :CrCompileFile<cr>
 endif