android: Use use_goma=1 gomadir gyp defines instead of magic GOMA_DIR env var.

build/common.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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 98 matching lines @@
               # gyp.
               'host_arch%':
                 '<!(uname -m | sed -e "s/i.86/ia32/;s/x86_64/x64/;s/amd64/x64/;s/arm.*/arm/;s/i86pc/ia32/")',
             }],
 
             # Embedded implies ozone.
             ['embedded==1', {
               'use_ozone%': 1,
             }],
 
-            ['OS=="android"', {
-              'android_goma_dir%': '<!(echo "${GOMA_DIR}")',
-            }, {
-              'android_goma_dir%': ''
-            }],
-
             ['embedded==1', {
               'use_system_fontconfig%': 0,
             }, {
               'use_system_fontconfig%': 1,
             }],
           ],
         },
         # Copy conditionally-set variables out one scope.
         'chromeos%': '<(chromeos)',
         'desktop_linux%': '<(desktop_linux)',
@@ skipping 86 matching lines @@
 
           ['use_ozone==1', {
             'use_ozone_evdev%': 1,
           }, {
             'use_ozone_evdev%': 0,
           }],
 
           # Set default gomadir.
           ['OS=="win"', {
             'gomadir': 'c:\\goma\\goma-win',
-          }],
-          ['android_goma_dir!=""', {
-            'use_goma': 1,
-            'gomadir': '<(android_goma_dir)',
-          }],
-          ['OS!="win" and android_goma_dir==""', {
+          }, {
             'gomadir': '<!(/bin/echo -n ${HOME}/goma)',
           }],
         ],
       },
 
       # Copy conditionally-set variables out one scope.
       'chromeos%': '<(chromeos)',
       'host_arch%': '<(host_arch)',
       'target_arch%': '<(target_arch)',
       'toolkit_views%': '<(toolkit_views)',
@@ skipping 4599 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }