Remove som GYP annotations, remove unused manifest.

chromecast/base/BUILD.gn

 # 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.
 
 import("//build/util/process_version.gni")
 import("//chromecast/chromecast.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 declare_args() {
   # Denotes the type of Cast product. This is #defined as CAST_PRODUCT_TYPE in
   # version.h. This is an integer in the range [0-4].
   if (is_android) {
     cast_product_type = 4
   } else {
     cast_product_type = 0
   }
 }
 
 if (is_android) {
   assert(cast_product_type == 4)
 } else {
   assert(cast_product_type >= 0 && cast_product_type <= 3)
 }
 
-# GYP target: chromecast.gyp:cast_base
 source_set("base") {
   sources = [
     "android/dumpstate_writer.cc",
     "android/dumpstate_writer.h",
     "android/system_time_change_notifier_android.cc",
     "android/system_time_change_notifier_android.h",
     "bind_to_task_runner.h",
     "cast_constants.cc",
     "cast_constants.h",
     "cast_paths.cc",
@@ skipping 61 matching lines @@
   sources = [
     "init_command_line_shlib.cc",
     "init_command_line_shlib.h",
   ]
 
   deps = [
     "//base",
   ]
 }
 
-# GYP target: n/a
 source_set("test_support") {
   sources = [
     "scoped_temp_file.cc",
     "scoped_temp_file.h",
   ]
 
   public_deps = [
     ":base",
     "//base",
   ]
 }
 
-# GYP target: chromecast_tests.gypi:cast_base_unittests
 test("cast_base_unittests") {
   sources = [
     "bind_to_task_runner_unittest.cc",
     "device_capabilities_impl_unittest.cc",
     "error_codes_unittest.cc",
     "path_utils_unittest.cc",
     "process_utils_unittest.cc",
     "serializers_unittest.cc",
     "system_time_change_notifier_unittest.cc",
   ]
@@ skipping 86 matching lines @@
     ]
   } else {
     extra_args += [
       "-e",
       "CAST_IS_DEBUG_BUILD=0",
     ]
   }
 }
 
 if (is_android) {
-  # GYP target: chromecast.gyp:jni_headers
   generate_jni("jni_headers") {
     sources = [
       "java/src/org/chromium/chromecast/base/ChromecastConfigAndroid.java",
       "java/src/org/chromium/chromecast/base/DumpstateWriter.java",
       "java/src/org/chromium/chromecast/base/SystemTimeChangeNotifierAndroid.java",
     ]
 
     jni_package = "chromecast"
   }
 
-  # GYP target: chromecast.gyp:cast_base_java
   android_library("base_java") {
     java_src_dir = "//chromecast/base/java/src"
     java_files = [
       "$java_src_dir/org/chromium/chromecast/base/CastSettingsManager.java",
       "$java_src_dir/org/chromium/chromecast/base/ChromecastConfigAndroid.java",
       "$java_src_dir/org/chromium/chromecast/base/DumpstateWriter.java",
       "$java_src_dir/org/chromium/chromecast/base/SystemTimeChangeNotifierAndroid.java",
     ]
 
     deps = [
       "//base:base_java",
     ]
   }
 }