Implement the skeleton of an android content shell.

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 2404 matching lines @@
                   '-Wl,-z,nocopyreloc',
                   # crtbegin_dynamic.o should be the last item in ldflags.
                   '<(android_ndk_lib)/crtbegin_dynamic.o',
                 ],
                 'libraries': [
                   # crtend_android.o needs to be the last item in libraries.
                   # Do not add any libraries after this!
                   '<(android_ndk_lib)/crtend_android.o',
                 ],
               }],
-              ['_type=="shared_library"', {
+              ['_type=="shared_library" or _type=="loadable_module"', {

[John Grabowski, 2012/04/19 18:55:27]

Can you briefly tell me why we're using loadable_module instead of
shared_library somewhere?  I don't think it's wrong but don't quite under the
distinction in the gyp sense.

[Ted C, 2012/04/19 23:21:07]

This was taken from downstream to make skia happy during linking.  I'm not
currently using the loadable_module portion, so I will remove it.

I did need to remove the flag you just added though -nostdlib

As it was causing errors for:
multiple definition of '__dso_handle'
multiple definition of '__INIT_ARRAY__'
multiple definition of '__FINI_ARRAY__'

                 'ldflags': [
                   '-Wl,-shared,-Bsymbolic',
+                  # crtbegin_so.o should be the last item in ldflags.
+                  '<(android_ndk_lib)/crtbegin_so.o',
+                ],
+                'libraries': [
+                  # crtend_so.o needs to be the last item in libraries.
+                  # Do not add any libraries after this!
+                  '<(android_ndk_lib)/crtend_so.o',
                 ],
               }],
             ],
           }],
           # Settings for building host targets using the system toolchain.
           ['_toolset=="host"', {
             'cflags!': [
               # Due to issues in Clang build system, using ASan on 32-bit
               # binaries on x86_64 host is problematic.
               # TODO(eugenis): re-enable.
@@ skipping 571 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',
   },
 }