Implemented new Translate API for purely Objective-C clients.

ios/web_view/internal/translate/web_view_translate_client.h

Index: ios/web_view/internal/translate/web_view_translate_client.h
diff --git a/ios/web_view/internal/translate/web_view_translate_client.h b/ios/web_view/internal/translate/web_view_translate_client.h
index 9d0816b63be1d96ddcbe9f2ec318606764795855..8a6b244a8e384b5eb5e3d0340c023c64c372580b 100644
--- a/ios/web_view/internal/translate/web_view_translate_client.h
+++ b/ios/web_view/internal/translate/web_view_translate_client.h
@@ -15,7 +15,8 @@
 #import "components/translate/ios/browser/ios_translate_driver.h"
 #include "ios/web/public/web_state/web_state_observer.h"
 #import "ios/web/public/web_state/web_state_user_data.h"
-#import "ios/web_view/public/cwv_translate_delegate.h"
+
+@class CWVTranslationController;
 
 class PrefService;
 
@@ -36,10 +37,13 @@ class WebViewTranslateClient
       public web::WebStateObserver,
       public web::WebStateUserData<WebViewTranslateClient> {
  public:
-  // Sets the delegate passed by the embedder.
-  // |delegate| is assumed to outlive this WebViewTranslateClient.
-  void set_translate_delegate(id<CWVTranslateDelegate> delegate) {
-    delegate_.reset(delegate);
+  // This |controller| will outlive this class.

[michaeldo, 2017/05/08 15:15:48]

Keeping the original wording seems clearer to me:
// |controller| is assumed to outlive this WebViewTranslateClient.

[jzw1, 2017/05/09 00:47:20]

Done.

+  void set_translation_controller(CWVTranslationController* controller) {
+    translation_controller_.reset(controller);
+  }
+
+  translate::TranslateManager* translate_manager() {
+    return translate_manager_.get();
   }
 
  private:
@@ -72,8 +76,8 @@ class WebViewTranslateClient
   std::unique_ptr<translate::TranslateManager> translate_manager_;
   translate::IOSTranslateDriver translate_driver_;
 
-  // Delegate provided by the embedder.
-  base::WeakNSProtocol<id<CWVTranslateDelegate>> delegate_;
+  // ObjC class that wraps this class.
+  base::WeakNSObject<CWVTranslationController> translation_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewTranslateClient);
 };