Fix ninja build for android.

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 792 matching lines @@
 
     # The desired version of Windows SDK can be set in ~/.gyp/include.gypi.
     'msbuild_toolset%': '',
 
     # Native Client is enabled by default.
     'disable_nacl%': 0,
 
     'platformsdk_exists': '<!(python <(DEPTH)/build/dir_exists.py <(platformsdk_path))',
     'wix_exists': '<!(python <(DEPTH)/build/dir_exists.py <(wix_path))',
 
+    # Provides an absolute path to PRODUCT_DIR (e.g. out/Release). An example
+    # usage is specifying the output directory for Ant in the Android build.
+    'absolute_product_dir': '/`cd <(PRODUCT_DIR) && pwd -P`',

[Nico, 2012/05/17 17:04:45]

Instead of the leading '/', you could name the variable something that doesn't
end in _dir, _dirs, _file, _files, _path, _paths. I think no relativization is
done for variables that don't end in those paths.

pwd won't work on windows.

[Yaron, 2012/05/17 17:20:26]

Done
Honestly nobody's tried developing Chrome for Android on windows. Mac used to
work and probably isn't far off. I don't want to spend time on windows right now
so I've moved the variable to an Android-only section.

+
     'conditions': [
       ['os_posix==1 and OS!="mac" and OS!="android"', {
         # This will set gcc_version to XY if you are running gcc X.Y.*.
         # This is used to tweak build flags for gcc 4.4.
         'gcc_version%': '<!(python <(DEPTH)/build/compiler_version.py)',
         # Figure out the python architecture to decide if we build pyauto.
         'python_arch%': '<!(<(DEPTH)/build/linux/python_arch.sh <(sysroot)/usr/<(system_libdir)/libpython<(python_ver).so.1.0)',
         'conditions': [
           ['branding=="Chrome"', {
             'linux_breakpad%': 1,
@@ skipping 2269 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',
   },
 }