Initialize CRIWVWebView with Configuration object instead of browserState.

ios/web_view/public/criwv_web_view.h

Index: ios/web_view/public/criwv_web_view.h
diff --git a/ios/web_view/public/criwv_web_view.h b/ios/web_view/public/criwv_web_view.h
index 9ead24cf125c4fbf18ad5bfd883713424290a5b7..e5b49342f04e4823aeaba443e94b9e6f02cf651b 100644
--- a/ios/web_view/public/criwv_web_view.h
+++ b/ios/web_view/public/criwv_web_view.h
@@ -6,6 +6,7 @@
 
 #import <UIKit/UIKit.h>
 
+@class CRIWVWebViewConfiguration;
 @protocol CRIWVWebViewDelegate;
 
 // A web view component (like WKWebView) which uses iOS Chromium's web view
@@ -40,6 +41,11 @@
 // undefined if the web view is not currently loading.
 @property(nonatomic, readonly) CGFloat loadProgress;
 
+// |configuration| must not be null
+- (instancetype)initWithFrame:(CGRect)frame
+                configuration:(CRIWVWebViewConfiguration*)configuration
+    NS_DESIGNATED_INITIALIZER;
+
 - (instancetype)initWithFrame:(CGRect)frame NS_UNAVAILABLE;
 - (instancetype)initWithCoder:(NSCoder*)aDecoder NS_UNAVAILABLE;