Implemented new Translate API for purely Objective-C clients.

ios/web_view/internal/translate/cwv_language_detection_result.mm

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