Fix proto_java_library comment example

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("//build/config/sanitizers/sanitizers.gni")
 import("//build/toolchain/toolchain.gni")
 import("//third_party/android_platform/config.gni")
@@ skipping 2193 matching lines @@
 #
 # This generates java files from protocol buffers and creates an Android library
 # containing the classes.
 #
 # Variables
 #   sources: Paths to .proto files to compile.
 #   proto_path: Root directory of .proto files.
 #
 # Example:
 #  proto_java_library("foo_proto_java") {
-#    proto_path = [ "src/foo" ]
+#    proto_path = "src/foo"
 #    sources = [ "$proto_path/foo.proto" ]
 #  }
 template("proto_java_library") {
   set_sources_assignment_filter([])
   forward_variables_from(invoker, [ "testonly" ])
   _protoc_dep = "//third_party/android_protobuf:android_protoc($host_toolchain)"
   _protoc_out_dir = get_label_info(_protoc_dep, "root_out_dir")
   _protoc_bin = "$_protoc_out_dir/android_protoc"
   _proto_path = invoker.proto_path
 
@@ skipping 29 matching lines @@
   }
 
   android_library(target_name) {
     java_files = []
     srcjar_deps = [ ":${_template_name}__protoc_java" ]
     deps = [
       "//third_party/android_protobuf:protobuf_nano_javalib",
     ]
   }
 }