Generate ChromeVersionConstants.java at build time.

build/android/java_cpp_template.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 generate Java source files from templates that are processed
 # through the host C pre-processor.
 #
 # To use this, create a gyp target with the following form:
 #  {
 #    'target_name': 'android_net_java_constants',
 #    'type': 'none',
 #    'sources': [
 #      'net/android/NetError.template',
 #    ],
 #    'variables': {
 #      'package_name': 'org/chromium/net',
 #      'template_deps': ['net/base/certificate_mime_type_list.h'],
 #    },
 #    'includes': [ '../build/android/java_cpp_template.gypi' ],
 #  },
 #
 # The 'sources' entry should only list template file. The template file
 # itself should use the 'ClassName.template' format, and will generate
-# 'gen/templates/<package-name>/ClassName.java. The files which template
-# dependents on and typically included by the template should be listed
+# 'gen/templates/<target-name>/<package-name>/ClassName.java. The files which
+# template dependents on and typically included by the template should be listed
 # in template_deps variables. Any change to them will force a rebuild of
 # the template, and hence of any source that depends on it.
 #
 
 {
   # Location where all generated Java sources will be placed.
   'variables': {
     'include_path%': '<(DEPTH)',
-    'output_dir': '<(SHARED_INTERMEDIATE_DIR)/templates/<(package_name)',
+    'output_dir': '<(SHARED_INTERMEDIATE_DIR)/templates/<(_target_name)/<(package_name)',
   },
   'direct_dependent_settings': {
     'variables': {
       # Ensure that the output directory is used in the class path
       # when building targets that depend on this one.
       'generated_src_dirs': [
         '<(output_dir)/',
       ],
       # Ensure dependents are rebuilt when sources for this rule change.
       'additional_input_paths': [
@@ skipping 23 matching lines @@
       'action': [
         'python', '<(DEPTH)/build/android/gyp/gcc_preprocess.py',
         '--include-path=<(include_path)',
         '--output=<(output_path)',
         '--template=<(RULE_INPUT_PATH)',
       ],
       'message': 'Generating Java from cpp template <(RULE_INPUT_PATH)',
     }
   ],
 }