Move Android version stamping from an exec_script -> build rule

build/config/android/rules.gni

 # Copyright 2014 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.
 
 import("//base/android/linker/config.gni")
 import("//build/config/android/config.gni")
 import("//build/config/android/internal_rules.gni")
 import("//third_party/android_platform/config.gni")
 import("//tools/grit/grit_rule.gni")
 
@@ skipping 1435 matching lines @@
       _native_libs +=
           [ "$root_build_dir/lib.stripped/libchromium_android_linker.so" ]
     }
 
     _enable_relocation_packing = false
     if (_use_chromium_linker && defined(invoker.enable_relocation_packing) &&
         invoker.enable_relocation_packing) {
       _enable_relocation_packing = true
     }
 
-    _native_lib_version_name = ""
-    if (defined(invoker.native_lib_version_name)) {
-      _native_lib_version_name = invoker.native_lib_version_name
+    _native_lib_version_rule = ""
+    if (defined(invoker.native_lib_version_rule)) {
+      _native_lib_version_rule = invoker.native_lib_version_rule
+    }
+    _native_lib_version_arg = "\"\""
+    if (defined(invoker.native_lib_version_arg)) {
+      _native_lib_version_arg = invoker.native_lib_version_arg
     }
   }
 
   _android_manifest_deps = []
   if (defined(invoker.android_manifest_dep)) {
     _android_manifest_deps = [ invoker.android_manifest_dep ]
   }
   _android_manifest = invoker.android_manifest
 
   _rebased_build_config = rebase_path(_build_config, root_build_dir)
@@ skipping 60 matching lines @@
       package_name = "org/chromium/base/library_loader"
       sources = [
         "//base/android/java/templates/NativeLibraries.template",
       ]
       inputs = [
         _build_config,
       ]
       deps = [
         ":$build_config_target",
       ]
+      if (_native_lib_version_rule != "") {
+        deps += [ _native_lib_version_rule ]
+      }
 
       defines = [
         "NATIVE_LIBRARIES_LIST=" +
             "@FileArg($_rebased_build_config:native:java_libraries_list)",
-        "NATIVE_LIBRARIES_VERSION_NUMBER=\"$_native_lib_version_name\"",
+        "NATIVE_LIBRARIES_VERSION_NUMBER=$_native_lib_version_arg",
       ]
       if (_use_chromium_linker) {
         defines += [ "ENABLE_CHROMIUM_LINKER" ]
       }
       if (_load_library_from_apk) {
         defines += [ "ENABLE_CHROMIUM_LINKER_LIBRARY_IN_ZIP_FILE" ]
       }
       if (_enable_chromium_linker_tests) {
         defines += [ "ENABLE_CHROMIUM_LINKER_TESTS" ]
       }
@@ skipping 661 matching lines @@
 template("uiautomator_test") {
   set_sources_assignment_filter([])
   if (defined(invoker.testonly)) {
     testonly = invoker.testonly
   }
   assert(target_name != "")
   assert(invoker.deps != [] || true)
   group(target_name) {
   }
 }