Port android_webview_shell.gyp to GN.

android_webview/android_webview_shell.gyp

 # 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.
 {
   'targets': [
+    # GN: //android_webview/tools:system_webview_shell_apk
     {
       'target_name': 'system_webview_shell_apk',
       'type': 'none',
       'variables': {
         'apk_name': 'SystemWebViewShell',
         'java_in_dir': 'tools/WebViewShell',
         'resource_dir': 'tools/WebViewShell/res',
         'android_manifest_path': 'tools/WebViewShell/AndroidManifest.xml', # for lint
       },
       'includes': [
         '../build/java_apk.gypi',
       ],
     },
     {
       # android_webview_apk creates a .jar as a side effect. Any java
       # targets that need that .jar in their classpath should depend on this
       # target. For more details see the content_shell_apk_java target.
       'target_name': 'system_webview_shell_apk_java',
       'type': 'none',
       'dependencies': [
         'system_webview_shell_apk',
       ],
       'includes': [ '../build/apk_fake_jar.gypi' ],
     },
+    # GN: //android_webview/tools:system_webview_shell_page_cycler_apk
     {
       'target_name': 'system_webview_shell_page_cycler_apk',
       'type': 'none',
       'dependencies': [
         '../base/base.gyp:base_java_test_support',
         '../content/content_shell_and_tests.gyp:content_java_test_support',
         '../testing/android/on_device_instrumentation.gyp:broker_java',
         '../testing/android/on_device_instrumentation.gyp:require_driver_apk',
         'system_webview_shell_apk_java',
       ],
       'variables': {
         'apk_name': 'SystemWebViewShellPageCycler',
         'java_in_dir': '../android_webview/tools/PageCycler',
         'is_test_apk': 1,
         'test_type': 'instrumentation',
         'android_manifest_path': '../android_webview/tools/PageCycler/AndroidManifest.xml',
       },
       'includes': [
         '../build/java_apk.gypi',
         '../build/android/test_runner.gypi',
       ],
     },
+    # GN: //android_webview/tools:system_webview_shell_layout_test_apk
     {
       'target_name': 'system_webview_shell_layout_test_apk',
       'type': 'none',
       'dependencies': [
         '../base/base.gyp:base_java_test_support',
         '../testing/android/on_device_instrumentation.gyp:broker_java',
         '../testing/android/on_device_instrumentation.gyp:require_driver_apk',
         'system_webview_shell_apk_java',
       ],
       'variables': {
         'apk_name': 'SystemWebViewShellLayoutTest',
         'java_in_dir': '../android_webview/tools/WebViewShellTest',
         'is_test_apk': 1,
         'test_type': 'instrumentation',
         'isolate_file': 'system_webview_shell_test_apk.isolate',
         'android_manifest_path': '../android_webview/tools/WebViewShellTest/AndroidManifest.xml',
       },
       'includes': [
         '../build/java_apk.gypi',
         '../build/android/test_runner.gypi',
       ]
     },
   ],
 }