Added pyautolib (dependency to run pyauto tests) to coverage_build target.

tools/code_coverage/coverage_posix.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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 465 matching lines @@
         sys.exit(1)
 
     # If told explicit tests, run those (after stripping the name as
     # appropriate)
     for testname in all_testnames:
       mo = re.search(r"(.*)\[(.*)\]$", testname)
       gtest_filter = None
       if mo:
         gtest_filter = mo.group(2)
         testname = mo.group(1)
-
       if ':' in testname:
         testname = testname.split(':')[1]
+      # We need 'pyautolib' to run pyauto tests and 'pyautolib' itself is not an
+      # executable. So skip this test from adding into coverage_bundles.py.
+      if testname == 'pyautolib':
+        continue
       self.tests += [os.path.join(self.directory, testname)]
       if gtest_filter:
         self.test_filters[testname] = gtest_filter
 
     # Add 'src/test/functional/pyauto_functional.py' to self.tests.
     # This file with '-v --suite=CONTINUOUS' arguments runs all pyauto tests.
     self.tests += [['src/chrome/test/functional/pyauto_functional.py',
                     '-v',
                     '--suite=CONTINUOUS']]
 
@@ skipping 480 matching lines @@
   if options.trim:
     coverage.TrimTests()
   coverage.RunTests()
   if options.genhtml:
     coverage.GenerateHtml()
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())