Set window scene identifier for iOS WebAuthn requests

rdar://106483264

Reviewed by Aditya Keerthi.

Start setting the window scene identifier for WebAuthn requests.

* Source/WebKit/Platform/spi/Cocoa/AuthenticationServicesCoreSPI.h:
* Source/WebKit/UIProcess/WebAuthentication/Cocoa/WebAuthenticatorCoordinatorProxy.mm:

Canonical link: https://commits.webkit.org/263182@main

Source/WebKit/Platform/spi/Cocoa/AuthenticationServicesCoreSPI.h

@@ -275,6 +275,10 @@ typedef NS_ENUM(NSInteger, ASCredentialRequestStyle) {
 @property (nonatomic) ASCredentialRequestStyle requestStyle;
 
 @property (nonatomic, nullable, copy) ASGlobalFrameIdentifier *globalFrameID;
+
+#if TARGET_OS_IOS
+@property (nonatomic, copy) NSString *windowSceneIdentifier;
+#endif
 @end
 
 @protocol ASCCredentialProtocol <NSObject, NSSecureCoding>

Source/WebKit/UIProcess/WebAuthentication/Cocoa/WebAuthenticatorCoordinatorProxy.mm

@@ -30,6 +30,7 @@
 
 #import "LocalService.h"
 #import "Logging.h"
+#import "PageClient.h"
 #import "WKError.h"
 #import "WebAuthenticationRequestData.h"
 #import "WebPageProxy.h"
@@ -500,6 +501,8 @@ static inline void continueAfterRequest(RetainPtr<id <ASCCredentialProtocol>> cr
     }
 #endif // PLATFORM(MAC) || PLATFORM(MACCATALYST)
 #if PLATFORM(IOS)
+    requestContext.get().windowSceneIdentifier = m_webPageProxy.pageClient().sceneID();
+
     [m_proxy performAuthorizationRequestsForContext:requestContext.get() withCompletionHandler:makeBlockPtr([weakThis = WeakPtr { *this }, handler = WTFMove(handler)](id<ASCCredentialProtocol> credential, NSError *error) mutable {
         callOnMainRunLoop([weakThis, handler = WTFMove(handler), credential = retainPtr(credential), error = retainPtr(error)] () mutable {
 #elif PLATFORM(MAC)