scons: excise more scons references from the code base

tools/code_coverage/coverage_posix.py

 #!/usr/bin/env python
 # Copyright (c) 2010 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.
 
 """Generate and process code coverage.
 
 TODO(jrg): rename this from coverage_posix.py to coverage_all.py!
 
 Written for and tested on Mac, Linux, and Windows.  To use this script
@@ skipping 51 matching lines @@
   http://src.chromium.org/viewvc/chrome/trunk/tools/buildbot/scripts/slave/runtest.py
 
 --target=NAME: specify the build target (e.g. 'Debug' or 'Release').
   This is used by buildbot scripts to help us find the output directory.
   Must be used with --build-dir.
 
 --build-dir=DIR: According to buildbot comments, this is the name of
   the directory within the buildbot working directory in which the
   solution, Debug, and Release directories are found.
   It's usually "src/build", but on mac it's $DIR/../xcodebuild and on
-  Linux it's $DIR/../sconsbuild or $DIR/sconsbuild or $DIR/out.
+  Linux it's $DIR/out.
   This is used by buildbot scripts to help us find the output directory.
   Must be used with --target.
 
 --no_exclusions: Do NOT use the exclusion list.  This script keeps a
   list of tests known to be problematic under coverage.  For example,
   ProcessUtilTest.SpawnChild will crash inside __gcov_fork() when
   using the MacOS 10.6 SDK.  Use of --no_exclusions prevents the use
   of this exclusion list.
 
 --dont-clear-coverage-data: Normally we clear coverage data from
@@ skipping 824 matching lines @@
   if options.trim:
     coverage.TrimTests()
   coverage.RunTests()
   if options.genhtml:
     coverage.GenerateHtml()
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())