Add nullability annotations for those missing.

Change-Id: Ie37a6821890db0b8e252ed064642857f4a94ab0e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1677844
Auto-Submit: Hiroshi Ichikawa <ichikawa@chromium.org>
Reviewed-by: John Wu <jzw@chromium.org>
Commit-Queue: Hiroshi Ichikawa <ichikawa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672712}

ios/web_view/public/cwv_navigation_delegate.h

@@ -10,6 +10,8 @@
 #import "cwv_export.h"
 #import "cwv_navigation_type.h"
 
+NS_ASSUME_NONNULL_BEGIN
+
 @protocol CRIWVTranslateDelegate;
 @class CWVDownloadTask;
 @class CWVSSLStatus;
@@ -102,4 +104,6 @@ FOUNDATION_EXPORT CWV_EXPORT NSErrorUserInfoKey CWVCertStatusKey;
 
 @end
 
+NS_ASSUME_NONNULL_END
+
 #endif  // IOS_WEB_VIEW_PUBLIC_CWV_NAVIGATION_DELEGATE_H_

ios/web_view/public/cwv_navigation_type.h

@@ -7,6 +7,8 @@
 
 #import <Foundation/Foundation.h>
 
+NS_ASSUME_NONNULL_BEGIN
+
 // Types of transitions between pages.
 typedef NS_OPTIONS(NSUInteger, CWVNavigationType) {
   // User got to this page by clicking a link on another page.
@@ -129,4 +131,6 @@ typedef NS_OPTIONS(NSUInteger, CWVNavigationType) {
   CWVNavigationTypeQualifierMask = 0xFFFFFF00,
 };
 
+NS_ASSUME_NONNULL_END
+
 #endif  // IOS_WEB_VIEW_PUBLIC_CWV_PAGE_TRANSITION_H_

ios/web_view/public/cwv_preferences.h

@@ -9,6 +9,8 @@
 
 #import "cwv_export.h"
 
+NS_ASSUME_NONNULL_BEGIN
+
 // Preferences for user settings. The preferences are stored on the local
 // storage.
 CWV_EXPORT
@@ -30,4 +32,6 @@ CWV_EXPORT
 
 @end
 
+NS_ASSUME_NONNULL_END
+
 #endif  // IOS_WEB_VIEW_PUBLIC_CWV_PREFERENCES_H_

ios/web_view/public/cwv_preferences_autofill.h

@@ -9,6 +9,8 @@
 
 #import "cwv_preferences.h"
 
+NS_ASSUME_NONNULL_BEGIN
+
 @interface CWVPreferences (Autofill)
 
 // Whether or not profile autofill is turned on. Defaults to |YES|.
@@ -34,4 +36,6 @@
 
 @end
 
+NS_ASSUME_NONNULL_END
+
 #endif  // IOS_WEB_VIEW_PUBLIC_CWV_PREFERENCES_AUTOFILL_H_

ios/web_view/public/cwv_web_view_autofill.h

@@ -7,6 +7,8 @@
 
 #import "cwv_web_view.h"
 
+NS_ASSUME_NONNULL_BEGIN
+
 @class CWVAutofillController;
 
 @interface CWVWebView (Autofill)
@@ -16,4 +18,6 @@
 
 @end
 
+NS_ASSUME_NONNULL_END
+
 #endif  // IOS_WEB_VIEW_PUBLIC_CWV_WEB_VIEW_AUTOFILL_H_