[Android] Rename package_name in java_cpp_template to package_path.

components/dom_distiller/core/android/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/android/rules.gni")
 
 android_library("dom_distiller_core_java") {
   deps = [
     "//base:base_java",
   ]
   java_files = [
     "java/src/org/chromium/components/dom_distiller/core/DomDistillerService.java",
     "java/src/org/chromium/components/dom_distiller/core/DomDistillerUrlUtils.java",
     "java/src/org/chromium/components/dom_distiller/core/DistilledPagePrefs.java",
   ]
 
   srcjar_deps = [
     ":dom_distiller_core_font_family_javagen",
     ":dom_distiller_core_theme_javagen",
   ]
 }
 
 java_cpp_template("dom_distiller_core_font_family_javagen") {
-  package_name = "org/chromium/components/dom_distiller/core"
+  package_path = "org/chromium/components/dom_distiller/core"
   sources = [
     "java/src/org/chromium/components/dom_distiller/core/FontFamily.template",
   ]
   inputs = [
     "../font_family_list.h",
   ]
 }
 
 java_cpp_template("dom_distiller_core_theme_javagen") {
-  package_name = "org/chromium/components/dom_distiller/core"
+  package_path = "org/chromium/components/dom_distiller/core"
   sources = [
     "java/src/org/chromium/components/dom_distiller/core/Theme.template",
   ]
   inputs = [
     "../theme_list.h",
   ]
 }