Remove java_home GYP variable from webrtc/build/common.gypi

webrtc/build/common.gypi

 # Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 # This file contains common settings for building WebRTC components.
 
 {
   # Nesting is required in order to use variables for setting other variables.
   'variables': {
     'variables': {
       'variables': {
         'variables': {
           # This will already be set to zero by supplement.gypi
           'build_with_chromium%': 1,
 
           # Enable to use the Mozilla internal settings.
           'build_with_mozilla%': 0,
         },
         'build_with_chromium%': '<(build_with_chromium)',
         'build_with_mozilla%': '<(build_with_mozilla%)',
         'include_opus%': 1,
 
         'conditions': [
-
           # Include the iLBC audio codec?
           ['build_with_chromium==1 or build_with_mozilla==1', {
             'include_ilbc%': 0,
           }, {
             'include_ilbc%': 1,
           }],
 
           ['build_with_chromium==1', {
             'webrtc_root%': '<(DEPTH)/third_party/webrtc',
             'apk_tests_path%': '<(DEPTH)/third_party/webrtc/build/apk_tests_noop.gyp',
@@ skipping 150 matching lines @@
         # TODO(andrew): For now, disable the Chrome plugins, which causes a
         # flood of chromium-style warnings. Investigate enabling them:
         # http://code.google.com/p/webrtc/issues/detail?id=163
         'clang_use_chrome_plugins%': 0,
 
         'include_pulse_audio%': 1,
         'include_internal_audio_device%': 1,
         'include_tests%': 1,
         'restrict_webrtc_logging%': 0,
       }],
-      ['OS=="android" or OS=="linux"', {
-        'java_home%': '<!(python -c "import os; dir=os.getenv(\'JAVA_HOME\', \'/usr/lib/jvm/java-7-openjdk-amd64\'); assert os.path.exists(os.path.join(dir, \'include/jni.h\')), \'Point \\$JAVA_HOME or the java_home gyp variable to a directory containing include/jni.h!\'; print dir")',
-      }],
       ['OS=="ios"', {
         'build_libjpeg%': 0,
       }],
       ['target_arch=="arm" or target_arch=="arm64"', {
         'prefer_fixed_point%': 1,
       }],
       ['(target_arch=="arm" and (arm_neon==1 or arm_neon_optional==1)) or target_arch=="arm64"', {
         'build_with_neon%': 1,
       }],
       ['OS!="ios" and (target_arch!="arm" or arm_version>=7) and target_arch!="mips64el"', {
@@ skipping 280 matching lines @@
           # of a more specific macro.
           'defines': [
             'WEBRTC_POSIX',
           ],
         }],
       ],
     },
   }, # target_defaults
 }