Reduce verbosity of Android builds.

build/java_apk.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 Android APKs in a consistent manner.
 #
 # To use this, create a gyp target with the following form:
 # {
 #   'target_name': 'my_package_apk',
@@ skipping 127 matching lines @@
           }
         }],
         ['proguard_enabled == "true" and proguard_flags != ""', {
           'inputs': ['<(java_in_dir)/<(proguard_flags)']
         }]
       ],
       'outputs': [
         '<(PRODUCT_DIR)/apks/<(apk_name).apk',
       ],
       'action': [
-        'ant',
+        'ant', '-quiet',
         '-DAPP_ABI=<(android_app_abi)',
         '-DANDROID_GDBSERVER=<(android_gdbserver)',
         '-DANDROID_SDK=<(android_sdk)',
         '-DANDROID_SDK_ROOT=<(android_sdk_root)',
         '-DANDROID_SDK_TOOLS=<(android_sdk_tools)',
         '-DANDROID_SDK_VERSION=<(android_sdk_version)',
         '-DANDROID_TOOLCHAIN=<(android_toolchain)',
         '-DCHROMIUM_SRC=<(ant_build_out)/../..',
         '-DCONFIGURATION_NAME=<(CONFIGURATION_NAME)',
         '-DPRODUCT_DIR=<(ant_build_out)',
@@ skipping 27 matching lines @@
     ['R_package != ""', {
       'variables': {
         # We generate R.java in package R_package (in addition to the package
         # listed in the AndroidManifest.xml, which is unavoidable).
         'additional_res_dirs': ['<(DEPTH)/build/android/ant/empty/res'],
         'additional_res_packages': ['<(R_package)'],
       },
     }],
   ],
 }