Let Android port access properly sized images

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:
 #  {
@@ skipping 16 matching lines @@
 # 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)',
   },
-  # Ensure that the output directory is used in the class path
-  # when building targets that depend on this one.
   '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': [
+        '<@(_sources)',
+        '<@(template_deps)',
+      ],
     },
   },
   # Define a single rule that will be apply to each .template file
   # listed in 'sources'.
   'rules': [
     {
       'rule_name': 'generate_java_constants',
       'extension': 'template',
       # Set template_deps as additional dependencies.
       'variables': {
@@ skipping 10 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)',
     }
   ],
 }