Cleanup ios/web_view.

ios/web_view/internal/translate/criwv_translate_manager_impl.h

Index: ios/web_view/internal/translate/criwv_translate_manager_impl.h
diff --git a/ios/web_view/internal/translate/criwv_translate_manager_impl.h b/ios/web_view/internal/translate/criwv_translate_manager_impl.h
index 445c2cba88288c4921e437db656dcfd46991b765..beb4275de0c4643cda13e195766742afe33fe74a 100644
--- a/ios/web_view/internal/translate/criwv_translate_manager_impl.h
+++ b/ios/web_view/internal/translate/criwv_translate_manager_impl.h
@@ -7,7 +7,6 @@
 
 #include <string>
 
-#include "base/memory/weak_ptr.h"
 #import "ios/web_view/public/criwv_translate_manager.h"
 
 namespace translate {
@@ -18,10 +17,13 @@ class TranslateManager;
 // translate::TranslateUIDelegate.
 @interface CRIWVTranslateManagerImpl : NSObject<CRIWVTranslateManager>
 
+- (instancetype)init NS_UNAVAILABLE;
+
 // |manager| is expexted to outlive this CRIWVTranslateManagerImpl.
 - (instancetype)initWithTranslateManager:(translate::TranslateManager*)manager
                           sourceLanguage:(const std::string&)source
-                          targetLanguage:(const std::string&)target;
+                          targetLanguage:(const std::string&)target
+    NS_DESIGNATED_INITIALIZER;
 
 @end