Add objc doc to the dartdoc output (#10905)

dev/bots/docs.sh

diff --git a/dev/bots/docs.sh b/dev/bots/docs.sh
index c9a7a41..8a563d6 100755
--- a/dev/bots/docs.sh
+++ b/dev/bots/docs.sh
@@ -14,7 +14,7 @@
 # a custom index.html, placing everything into dev/docs/doc.
 (cd dev/tools; ../../bin/cache/dart-sdk/bin/pub get)
 FLUTTER_ROOT=$PWD bin/cache/dart-sdk/bin/dart dev/tools/dartdoc.dart
-FLUTTER_ROOT=$PWD bin/cache/dart-sdk/bin/dart dev/tools/javadoc.dart
+FLUTTER_ROOT=$PWD bin/cache/dart-sdk/bin/dart dev/tools/java_and_objc_doc.dart
 
 # Ensure google webmaster tools can verify our site.
 cp dev/docs/google2ed1af765c529f57.html dev/docs/doc

dev/docs/platform_integration/lib/ios.dart

diff --git a/dev/docs/platform_integration/lib/ios.dart b/dev/docs/platform_integration/lib/ios.dart
new file mode 100644
index 0000000..86c2012
--- /dev/null
+++ b/dev/docs/platform_integration/lib/ios.dart
@@ -0,0 +1,2 @@
+/// [Flutter platform integration APIs for iOS.](https://docs.flutter.io/objcdoc/)
+library iOS;

dev/tools/dartdoc.dart

diff --git a/dev/tools/dartdoc.dart b/dev/tools/dartdoc.dart
index fab1c4e..43947eb 100644
--- a/dev/tools/dartdoc.dart
+++ b/dev/tools/dartdoc.dart
@@ -200,6 +200,11 @@
     'href="Android/Android-library.html"',
     'href="https://docs.flutter.io/javadoc/"'
   );
+  indexContents = indexContents.replaceAll(
+      'href="iOS/iOS-library.html"',
+      'href="https://docs.flutter.io/objc/"'
+  );
+
   indexFile.writeAsStringSync(indexContents);
 }
 
@@ -243,10 +248,13 @@
   }
 
   // Add a fake package for platform integration APIs.
-  if (diskPath)
+  if (diskPath) {
     yield 'platform_integration/lib/android.dart';
-  else
+    yield 'platform_integration/lib/ios.dart';
+  } else {
     yield 'platform_integration/android.dart';
+    yield 'platform_integration/ios.dart';
+  }
 }
 
 void printStream(Stream<List<int>> stream) {

dev/tools/java_and_objc_doc.dart

diff --git a/dev/tools/java_and_objc_doc.dart b/dev/tools/java_and_objc_doc.dart
new file mode 100644
index 0000000..4a59b21
--- /dev/null
+++ b/dev/tools/java_and_objc_doc.dart
@@ -0,0 +1,53 @@
+// Copyright 2017 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 'dart:async';
+import 'dart:io';
+
+import 'package:archive/archive.dart';
+import 'package:http/http.dart' as http;
+
+const String kDocRoot = 'dev/docs/doc';
+
+/// This script downloads an archive of Javadoc and objc doc for the engine from
+/// the artifact store and extracts them to the location used for Dartdoc.
+Future<Null> main(List<String> args) async {
+  final String engineVersion =
+      new File('bin/internal/engine.version').readAsStringSync().trim();
+
+  final String javadocUrl =
+      'https://storage.googleapis.com/flutter_infra/flutter/$engineVersion/android-javadoc.zip';
+  generateDocs(javadocUrl, 'javadoc', 'io/flutter/view/FlutterView.html');
+
+  final String objcdocUrl =
+      'https://storage.googleapis.com/flutter_infra/flutter/$engineVersion/ios-objcdoc.zip';
+  generateDocs(
+      objcdocUrl, 'objcdoc', 'objc/Classes/FlutterViewController.html');
+}
+
+Future<Null> generateDocs(
+    final String url, String docName, String checkFile) async {
+  final http.Response response = await http.get(url);
+
+  final Archive archive = new ZipDecoder().decodeBytes(response.bodyBytes);
+
+  final Directory output = new Directory('$kDocRoot/$docName');
+  print('Extracing $docName to ${output.path}');
+  output.createSync(recursive: true);
+
+  for (ArchiveFile af in archive) {
+    if (af.isFile) {
+      final File file = new File('${output.path}/${af.name}');
+      file.createSync(recursive: true);
+      file.writeAsBytesSync(af.content);
+    }
+  }
+
+  final File testFile = new File('${output.path}/$checkFile');
+  if (!testFile.existsSync()) {
+    print('Expected file ${testFile.path} not found');
+    exit(1);
+  }
+  print('$docName ready to go!');
+}

dev/tools/javadoc.dart

diff --git a/dev/tools/javadoc.dart b/dev/tools/javadoc.dart
deleted file mode 100644
index 2b99f0e..0000000
--- a/dev/tools/javadoc.dart
+++ /dev/null
@@ -1,41 +0,0 @@
-// Copyright 2017 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 'dart:async';
-import 'dart:io';
-
-import 'package:archive/archive.dart';
-import 'package:http/http.dart' as http;
-
-const String kDocRoot = 'dev/docs/doc';
-
-/// This script downloads an archive of Javadoc for the engine from the
-/// artifact store and extracts it to the location used for Dartdoc.
-Future<Null> main(List<String> args) async {
-  final String engineVersion = new File('bin/internal/engine.version').readAsStringSync().trim();
-
-  final String url = 'https://storage.googleapis.com/flutter_infra/flutter/$engineVersion/android-javadoc.zip';
-  final http.Response response = await http.get(url);
-
-  final Archive archive = new ZipDecoder().decodeBytes(response.bodyBytes);
-
-  final Directory output = new Directory('$kDocRoot/javadoc');
-  print('Extracing javadoc to ${output.path}');
-  output.createSync(recursive: true);
-
-  for (ArchiveFile af in archive) {
-    if (af.isFile) {
-      final File file = new File('${output.path}/${af.name}');
-      file.createSync(recursive: true);
-      file.writeAsBytesSync(af.content);
-    }
-  }
-
-  final File testFile = new File('${output.path}/io/flutter/view/FlutterView.html');
-  if (!testFile.existsSync()) {
-    print('Expected file ${testFile.path} not found');
-    exit(1);
-  }
-  print('Javadocs ready to go!');
-}