Output better error messages during build

build/android/javac.py

 #!/usr/bin/env python
 #
 # Copyright 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.
 
 import fnmatch
 import optparse
 import os
-import subprocess
 import sys
 
 from pylib import build_utils
 
 def DoJavac(options):
   output_dir = options.output_dir
 
   src_dirs = build_utils.ParseGypList(options.src_dirs)
   java_files = build_utils.FindInDirectories(src_dirs, '*.java')
   if options.javac_includes:
@@ skipping 13 matching lines @@
 
   classpath = build_utils.ParseGypList(options.classpath)
 
   # Delete the classes directory. This ensures that all .class files in the
   # output are actually from the input .java files. For example, if a .java
   # file is deleted or an inner class is removed, the classes directory should
   # not contain the corresponding old .class file after running this action.
   build_utils.DeleteDirectory(output_dir)
   build_utils.MakeDirectory(output_dir)
 
-  subprocess.check_call([
+  build_utils.CheckCallDie([
       'javac',
       '-g',
       '-Xlint:unchecked',
       '-source', '1.5',
       '-target', '1.5',
       '-classpath', ':'.join(classpath),
       '-d', output_dir] +
       java_files)
 
 
@@ skipping 15 matching lines @@
   DoJavac(options)
 
   if options.stamp:
     build_utils.Touch(options.stamp)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))