Revert of android: Make dex_action.gypi not call md5sum.

build/android/dex_action.gypi

 # 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.
 
 # This file is meant to be included into an action to provide a rule that dexes
 # compiled java files. If proguard_enabled == "true" and CONFIGURATION_NAME ==
 # "Release", then it will dex the proguard_enabled_input_path instead of the
 # normal dex_input_paths/dex_generated_input_paths.
 #
 # To use this, create a gyp target with the following form:
 #  {
 #    'action_name': 'some name for the action'
 #    'actions': [
 #      'variables': {
 #        'dex_input_paths': [ 'files to dex (when proguard is not used) and add to input paths' ],
 #        'dex_generated_input_dirs': [ 'dirs that contain generated files to dex' ],
+#        'input_paths': [ 'additional files to be added to the list of inputs' ],
 #
 #        # For targets that use proguard:
 #        'proguard_enabled': 'true',
 #        'proguard_enabled_input_path': 'path to dex when using proguard',
 #      },
 #      'includes': [ 'relative/path/to/dex_action.gypi' ],
 #    ],
 #  },
 #
 
 {
   'message': 'Creating dex file: <(output_path)',
   'variables': {
     'dex_input_paths': [],
     'dex_generated_input_dirs': [],
+    'input_paths': [],
     'proguard_enabled%': 'false',
     'proguard_enabled_input_path%': '',
     'dex_no_locals%': 0,
   },
   'inputs': [
     '<(DEPTH)/build/android/gyp/util/build_utils.py',
     '<(DEPTH)/build/android/gyp/util/md5_check.py',
     '<(DEPTH)/build/android/gyp/dex.py',
+    '>@(input_paths)',
     '>@(dex_input_paths)',
   ],
   'outputs': [
     '<(output_path)',
   ],
   'action': [
     'python', '<(DEPTH)/build/android/gyp/dex.py',
     '--dex-path=<(output_path)',
     '--android-sdk-tools=<(android_sdk_tools)',
     '--configuration-name=<(CONFIGURATION_NAME)',
     '--proguard-enabled=<(proguard_enabled)',
     '--proguard-enabled-input-path=<(proguard_enabled_input_path)',
     '--no-locals=<(dex_no_locals)',
+
+    # TODO(newt): remove this once http://crbug.com/177552 is fixed in ninja.
+    '--ignore=>!(echo \'>(_inputs)\' | md5sum)',
+
     '>@(dex_input_paths)',
     '>@(dex_generated_input_dirs)',
   ]
 }