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..3f9543bc1b8185f9930136359678d5d0c268bc51
--- /dev/null
+++ b/ios/web_view/internal/translate/cwv_language_detection_result.mm
@@ -0,0 +1,32 @@
+// 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/public/cwv_translation_language.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+@implementation CWVLanguageDetectionResult
+
+@synthesize sourceLanguage = _sourceLanguage;
+@synthesize targetLanguage = _targetLanguage;
+@synthesize supportedLanguages = _supportedLanguages;
+
+- (instancetype)initWithSourceLanguage:(CWVTranslationLanguage*)sourceLanguage
+                        targetLanguage:(CWVTranslationLanguage*)targetLanguage
+                    supportedLanguages:
+                        (NSArray<CWVTranslationLanguage*>*)supportedLanguages {
+  self = [super init];
+  if (self) {
+    _sourceLanguage = sourceLanguage;
+    _targetLanguage = targetLanguage;
+    _supportedLanguages = supportedLanguages;
+  }
+  return self;
+}
+
+@end