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 e3f1d4dd7c006b4d802595dcfda6aa489deab2ab..b214e5f98946f7136e046d745beef6869d84401d 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;
 
@@ -38,10 +39,13 @@ class WebViewTranslateClient
  public:
   ~WebViewTranslateClient() override;
 
-  // 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| is assumed to outlive this WebViewTranslateClient.
+  void set_translation_controller(CWVTranslationController* controller) {
+    translation_controller_.reset(controller);
+  }
+
+  translate::TranslateManager* translate_manager() {
+    return translate_manager_.get();
   }
 
  private:
@@ -73,8 +77,8 @@ 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);
 };