Add support for generating jars from protos and add cacheinvalidation_java.

build/java.gypi

 # 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.
 
 # This file is meant to be included into a target to provide a rule
 # to build Java in a consistent manner.
 #
 # To use this, create a gyp target with the following form:
 # {
 #   'target_name': 'my-package_java',
@@ skipping 16 matching lines @@
 #  additional_input_paths - These paths will be included in the 'inputs' list to
 #    ensure that this target is rebuilt when one of these paths changes.
 #  additional_src_dirs - Additional directories with .java files to be compiled
 #    and included in the output of this target.
 #  generated_src_dirs - Same as additional_src_dirs except used for .java files
 #    that are generated at build time. This should be set automatically by a
 #    target's dependencies. The .java files in these directories are not
 #    included in the 'inputs' list (unlike additional_src_dirs).
 #  input_jars_paths - The path to jars to be included in the classpath. This
 #    should be filled automatically by depending on the appropriate targets.
-#  include_files - A list of specific files to include. This is by default
+#  javac_includes - A list of specific files to include. This is by default
 #    empty, which leads to inclusion of all files specified. May include
 #    wildcard, and supports '**/' for recursive path wildcards, ie.:
 #    '**/MyFileRegardlessOfDirectory.java', '**/IncludedPrefix*.java'.
 
 {
   'dependencies': [
     '<(DEPTH)/build/build_output_dirs_android.gyp:build_output_dirs'
   ],
   # This all_dependent_settings is used for java targets only. This will add the
   # chromium_<(package_name) jar to the classpath of dependent java targets.
@@ skipping 39 matching lines @@
         '-DPACKAGE_NAME=<(package_name)',
         '-DJAVAC_INCLUDES=>(javac_includes)',
 
         '-Dbasedir=<(java_in_dir)',
         '-buildfile',
         '<(DEPTH)/build/android/ant/chromium-jars.xml'
       ]
     },
   ],
 }