Files required by a service now listed in manifest.

base/android/apk_assets.cc

 // 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.
 
 #include <jni.h>
 
 #include "base/android/apk_assets.h"
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
+#include "base/file_descriptor_store.h"
 #include "jni/ApkAssets_jni.h"
 
 namespace base {
 namespace android {
 
 int OpenApkAsset(const std::string& file_path,
                  base::MemoryMappedFile::Region* region) {
-  // The AAssetManager API of the NDK is does not expose a method for accessing
-  // raw resources :(.
+  // The AssetManager API of the NDK does not expose a method for accessing raw
+  // resources :(
   JNIEnv* env = base::android::AttachCurrentThread();
   ScopedJavaLocalRef<jlongArray> jarr = Java_ApkAssets_open(
       env, base::android::GetApplicationContext(),
       base::android::ConvertUTF8ToJavaString(env, file_path));
   std::vector<jlong> results;
   base::android::JavaLongArrayToLongVector(env, jarr.obj(), &results);
   CHECK_EQ(3U, results.size());
   int fd = static_cast<int>(results[0]);
   region->offset = results[1];
   region->size = results[2];
   return fd;
 }
 
+bool RegisterApkAssetWithFileDescriptorStore(const std::string& key,
+                                             const std::string& file_path) {
+  base::MemoryMappedFile::Region region =
+      base::MemoryMappedFile::Region::kWholeFile;
+  int asset_fd = OpenApkAsset(file_path, &region);
+  if (asset_fd == -1)
+    return false;

[nyquist, 2017/02/10 23:37:50]

Should the function for global descriptors follow the same pattern? I find this
new function easier to read.

[Jay Civelli, 2017/02/13 18:48:25]

Anything to make you happy, Tommy :-) 

+  base::FileDescriptorStore::GetInstance().Set(key, base::ScopedFD(asset_fd),
+                                               region);
+  return true;
+}
+
 bool RegisterApkAssetWithGlobalDescriptors(base::GlobalDescriptors::Key key,
                                            const std::string& file_path) {
   base::MemoryMappedFile::Region region =
       base::MemoryMappedFile::Region::kWholeFile;
   int asset_fd = OpenApkAsset(file_path, &region);
   if (asset_fd != -1) {
     base::GlobalDescriptors::GetInstance()->Set(key, asset_fd, region);
   }
   return asset_fd != -1;
 }
 
 }  // namespace android
 }  // namespace base