Android: Remove unneeded RegisterNatives() calls

device/power_save_blocker/BUILD.gn

 # Copyright 2016 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/config/features.gni")
 import("//build/config/ui.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 component("power_save_blocker") {
   sources = [
     "power_save_blocker.h",
     "power_save_blocker_android.cc",
-    "power_save_blocker_android.h",
     "power_save_blocker_chromeos.cc",
     "power_save_blocker_mac.cc",
     "power_save_blocker_ozone.cc",
     "power_save_blocker_win.cc",
     "power_save_blocker_x11.cc",
   ]
 
   defines = [ "DEVICE_POWER_SAVE_BLOCKER_IMPLEMENTATION" ]
 
   deps = [
@@ skipping 16 matching lines @@
   # given the interaction between os_chromeos and the feature flags for X11 and
   # ozone, so do it all in one spot.
   if (is_chromeos || !use_ozone) {
     sources -= [ "power_save_blocker_ozone.cc" ]
   }
   if (is_chromeos || !use_x11 || !use_dbus) {
     sources -= [ "power_save_blocker_x11.cc" ]
   }
 
   if (is_android) {
-    sources += [
-      "power_save_blocker_jni_registrar.cc",
-      "power_save_blocker_jni_registrar.h",
-    ]
-
     deps += [
       ":jni_headers",
       "//ui/android",
     ]
   }
 
   if (is_chromeos) {
     deps += [
       "//chromeos",
       "//chromeos:power_manager_proto",
@@ skipping 17 matching lines @@
   }
 
   android_library("java") {
     java_files = java_sources_needing_jni
     deps = [
       "//base:base_java",
       "//ui/android:ui_java",
     ]
   }
 }