Implemented new Translate API for purely Objective-C clients.

ios/web_view/internal/translate/cwv_language_detection_result.mm

Index: ios/web_view/internal/translate/cwv_language_detection_result.mm
diff --git a/ios/web_view/internal/translate/cwv_language_detection_result.mm b/ios/web_view/internal/translate/cwv_language_detection_result.mm
new file mode 100644
index 0000000000000000000000000000000000000000..c659c9990d973d4912469bed20614d7242df6c03
--- /dev/null
+++ b/ios/web_view/internal/translate/cwv_language_detection_result.mm
@@ -0,0 +1,33 @@
+// 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 "ios/web_view/public/cwv_language_detection_result.h"
+
+#import "ios/web_view/internal/translate/cwv_language_detection_result_internal.h"
+#import "ios/web_view/public/cwv_translation_language.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+@implementation CWVLanguageDetectionResult
+
+@synthesize pageLanguage = _pageLanguage;
+@synthesize OSLanguage = _OSLanguage;
+@synthesize supportedLanguages = _supportedLanguages;
+
+- (instancetype)initWithPageLanguage:(CWVTranslationLanguage*)pageLanguage
+                          OSLanguage:(CWVTranslationLanguage*)OSLanguage
+                  supportedLanguages:
+                      (NSArray<CWVTranslationLanguage*>*)supportedLanguages {
+  self = [super init];
+  if (self) {
+    _pageLanguage = pageLanguage;
+    _OSLanguage = OSLanguage;
+    _supportedLanguages = supportedLanguages;

[Eugene But (OOO till 7-30), 2017/04/27 13:08:08]

[supportedLanguages copy] ?

[jzw1, 2017/04/28 02:34:54]

it was copied on its way in, do you prefer to have it in here?

[Eugene But (OOO till 7-30), 2017/04/28 03:07:28]

I don't think this code should make assumptions about calling code, so maybe
copying NSArray is better:
https://google.github.io/styleguide/objcguide.xml#Setters_copy_NSStrings

[Eugene But (OOO till 7-30), 2017/04/28 07:18:07]

Please look at this comment

+  }
+  return self;
+}
+
+@end