Upstream ChromeBrowserState sub-classes.

ios/public/provider/chrome/browser/ui/default_ios_web_view_factory.h

Index: ios/public/provider/chrome/browser/ui/default_ios_web_view_factory.h
diff --git a/ios/public/provider/chrome/browser/ui/default_ios_web_view_factory.h b/ios/public/provider/chrome/browser/ui/default_ios_web_view_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..973b29519c8a642ab5f7e114d6bacadd489b2e6d
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+++ b/ios/public/provider/chrome/browser/ui/default_ios_web_view_factory.h
@@ -0,0 +1,34 @@
+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_PUBLIC_PROVIDER_CHROME_BROWSER_UI_DEFAULT_IOS_WEB_VIEW_FACTORY_H_
+#define IOS_PUBLIC_PROVIDER_CHROME_BROWSER_UI_DEFAULT_IOS_WEB_VIEW_FACTORY_H_
+
+#import <UIKit/UIKit.h>
+
+// External services to use in |newExternalWebView:|.
+typedef enum {
+  SSO_AUTHENTICATION,
+  NUM_SHARING_SERVICES
+} IOSWebViewFactoryExternalService;
+
+@protocol IOSWebViewFactory
+
+// Returns a new instance of |UIWebView| that will be used within external
+// libraries.
++ (UIWebView*)
+    newExternalWebView:(IOSWebViewFactoryExternalService)externalService;
+
+@end
+
+// Factory for creating |UIWebView|'s on iOS. Returns vanilla |UIWebView|'s by
+// default, with an interface by which another class implementing
+// |IOSWebViewFactory| can register to have its methods called instead.
+@interface DefaultIOSWebViewFactory : NSObject<IOSWebViewFactory>
+
++ (void)registerWebViewFactory:(Class)webViewFactoryClass;
+
+@end
+
+#endif  // IOS_PUBLIC_PROVIDER_CHROME_BROWSER_UI_DEFAULT_IOS_WEB_VIEW_FACTORY_H_