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..6b91239484e25f91d18e97170fb0c986e88e12a8 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 +15,6 @@
 #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 PrefService;
 
@@ -29,6 +28,8 @@ namespace web {
 class WebState;
 }
 
+@class CWVTranslationController;
+
 namespace ios_web_view {
 
 class WebViewTranslateClient
@@ -36,10 +37,12 @@ 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);
+  void set_cwv_translation_controller(CWVTranslationController* controller) {
+    cwv_translation_controller_.reset(controller);
+  }
+
+  translate::TranslateManager* GetTranslateManager() {
+    return translate_manager_.get();
   }
 
  private:
@@ -72,8 +75,7 @@ class WebViewTranslateClient
   std::unique_ptr<translate::TranslateManager> translate_manager_;
   translate::IOSTranslateDriver translate_driver_;
 
-  // Delegate provided by the embedder.
-  base::WeakNSProtocol<id<CWVTranslateDelegate>> delegate_;
+  base::WeakNSObject<CWVTranslationController> cwv_translation_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewTranslateClient);
 };