Building cronet targets multiple times now reports "no work to do"

components/cronet/android/BUILD.gn

 # 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.
 
 import("//build/buildflag_header.gni")
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 import("//build/util/version.gni")
 import("//chrome/version.gni")
 import("//testing/test.gni")
@@ skipping 798 matching lines @@
   ]
 }
 
 template("jar_src") {
   action(target_name) {
     _rebased_src_dirs = rebase_path(invoker.src_dirs, root_build_dir)
 
     script = "//components/cronet/tools/jar_src.py"
     depfile = "$target_gen_dir/$target_name.d"
     outputs = [
-      depfile,
       invoker.jar_path,
     ]
     args = [
       "--src-dir=${_rebased_src_dirs}",
       "--jar-path",
       rebase_path(invoker.jar_path, root_build_dir),
       "--depfile",
       rebase_path(depfile, root_build_dir),
     ]
 
     if (defined(invoker.src_jars)) {
+      inputs = invoker.src_jars
       _rebased_src_jars = rebase_path(invoker.src_jars, root_build_dir)
       args += [ "--src-jar=${_rebased_src_jars}" ]
     }
     deps = [
       ":effective_connection_type_java",
     ]
   }
 }
 
 jar_src("jar_cronet_api_source") {
@@ skipping 116 matching lines @@
   ]
   deps = [
     ":cronet",
   ]
 }
 
 # Enforce that ARM Neon is not used when building for ARMv7
 if (target_cpu == "arm" && arm_version == 7 && !arm_use_neon) {
   action("enforce_no_neon") {
     script = "//components/cronet/tools/check_no_neon.py"
+    outputs = [
+      "$target_gen_dir/$target_name.stamp",
+    ]
     args = [
       rebase_path("${android_tool_prefix}objdump", root_build_dir),
 
       # libcronet.so may contain ARM Neon instructions from BoringSSL, but these
       # are only used after checking whether the CPU supports NEON at runtime,
       # so instead check base/ as it represents a large swath of code that only
       # contains Neon instructions when Neon is enabled by default.
       rebase_path("$root_out_dir/obj/base/base/*.o", root_build_dir),
-    ]
-    outputs = [
-      "$root_out_dir/cronet_$target_name.d",
+      "--stamp",
+      rebase_path(outputs[0], root_build_dir),
     ]
     deps = [
       "//base:base",
     ]
   }
 }
 
 group("cronet_package") {
   # Enforce that arm_use_neon==false when building for ARMv7 by
   # not including any deps in cronet_package target otherwise.
   if (!(target_cpu == "arm" && arm_version == 7) || !arm_use_neon) {
     deps = [
       ":cronet_combine_proguard_flags",
       ":cronet_package_copy",
       ":cronet_package_copy_native_lib",
       ":cronet_package_copy_native_lib_unstripped",
       ":generate_javadoc",
       ":generate_licenses",
       ":jar_cronet_api_source",
       ":jar_cronet_other_source",
       ":jar_cronet_sample_source",
       ":repackage_extracted_jars",
     ]
     if (current_cpu == "arm" && arm_version == 7) {
       deps += [ ":enforce_no_neon" ]
     }
   }
 }