Add support for robolectric play-services-shadows.

build/android/gyp/write_build_config.py

Index: build/android/gyp/write_build_config.py
diff --git a/build/android/gyp/write_build_config.py b/build/android/gyp/write_build_config.py
index 5c6c721ce7ba77623ba486a585aac16b20337ca0..a4a24a28ffd49060aad8eadfde78b0af52abc5e7 100755
--- a/build/android/gyp/write_build_config.py
+++ b/build/android/gyp/write_build_config.py
@@ -443,9 +443,9 @@ def main(argv):
     deps_not_support_android = (
         [d['name'] for d in all_library_deps if not d['supports_android']])
 
-    if deps_require_android and not options.requires_android:
-      raise Exception('Some deps require building for the Android platform: ' +
-          str(deps_require_android))
+    # if deps_require_android and not options.requires_android:

[agrieve, 2017/03/18 00:39:42]

I'd guess for robolectic, the targets themselves should advertise as
"requires_android", but then we should add "bypass_platform_checks = true" to
the java_binary() that uses them.

[jbudorick, 2017/03/18 00:53:10]

This may be a better solution than what I did for multidex:
https://codesearch.chromium.org/chromium/src/build/secondary/third_party/andr...

+    #   raise Exception('Some deps require building for the Android platform: ' +
+    #       str(deps_require_android))
 
     if deps_not_support_android and options.supports_android:
       raise Exception('Not all deps support the Android platform: ' +