Remove GYP annotations from third_party GN files.

third_party/cacheinvalidation/BUILD.gn

 # 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("//testing/test.gni")
 
 config("cacheinvalidation_config") {
   include_dirs = [
     "overrides",
     "src",
@@ skipping 99 matching lines @@
     "//base",
     "//base/test:run_all_unittests",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 
-  # GYP: //third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation_proto_java
   proto_java_library("cacheinvalidation_proto_java") {
     proto_path = "src/proto"
     sources = [
       "$proto_path/android_channel.proto",
       "$proto_path/android_listener.proto",
       "$proto_path/android_service.proto",
       "$proto_path/channel_common.proto",
       "$proto_path/client.proto",
       "$proto_path/client_protocol.proto",
       "$proto_path/java_client.proto",
       "$proto_path/types.proto",
     ]
   }
 
-  # GYP: //third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation_javalib
   android_library("cacheinvalidation_javalib") {
     chromium_code = false
     emma_never_instrument = true
     deps = [
       ":cacheinvalidation_proto_java",
       "//third_party/android_protobuf:protobuf_nano_javalib",
       "//third_party/android_tools:android_gcm_java",
       google_play_services_library,
     ]
 
@@ skipping 88 matching lines @@
       "src/java/com/google/ipc/invalidation/util/NamedRunnable.java",
       "src/java/com/google/ipc/invalidation/util/Preconditions.java",
       "src/java/com/google/ipc/invalidation/util/ProtoWrapper.java",
       "src/java/com/google/ipc/invalidation/util/Smearer.java",
       "src/java/com/google/ipc/invalidation/util/TextBuilder.java",
       "src/java/com/google/ipc/invalidation/util/TypedUtil.java",
       "src/java/com/google/ipc/invalidation/util/UtilFormatter.java",
     ]
   }
 }