Update from https://crrev.com/312600

testing/test.gni

 # Copyright 2015 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.
 
 # ==============================================================================
 # TEST SETUP
 # ==============================================================================
 
 # Define a test as an executable (or apk on Android) with the "testonly" flag
 # set.
@@ skipping 108 matching lines @@
       if (defined(invoker.output_name)) {
         test_output_name = invoker.output_name
         unittests_binary = "lib${test_output_name}.so"
       }
       deps = [
         ":$library_name",
       ]
       if (defined(invoker.apk_deps)) {
         deps += invoker.apk_deps
       }
+      if (defined(invoker.apk_asset_location)) {

[jamesr, 2015/01/22 18:19:01]

aha, there's the ticket

+        asset_location = invoker.apk_asset_location
+      }
     }
 
     group(target_name) {
       testonly = true
 
       deps = [
         ":$library_name",
         ":$apk_name",
       ]
     }
@@ skipping 89 matching lines @@
       }
       if (defined(invoker.sources)) {
         sources = invoker.sources
       }
       if (defined(invoker.visibility)) {
         visibility = invoker.visibility
       }
     }
   }
 }