Use UUID::createVersion4Weak for Document constructor

https://bugs.webkit.org/show_bug.cgi?id=267897
rdar://121405807

Reviewed by Ryosuke Niwa.

We do not need cryptographically random values here. Use UUID::createVersion4Weak.

* Source/WTF/wtf/UUID.cpp:
(WTF::createVersion4UUIDString):
* Source/WTF/wtf/UUID.h:
* Source/WebCore/dom/Document.cpp:
(WebCore::Document::originIdentifierForPasteboard const):
(WebCore::Document::didInsertAttachmentElement):
* Source/WebCore/platform/ScriptExecutionContextIdentifier.h:
(WebCore::ProcessQualified<WTF::UUID>::generate):

Canonical link: https://commits.webkit.org/273344@main

Source/WTF/wtf/UUID.cpp

@@ -153,6 +153,11 @@ String createVersion4UUIDString()
     return makeString(UUID::createVersion4());
 }
 
+String createVersion4UUIDStringWeak()
+{
+    return makeString(UUID::createVersion4Weak());
+}
+
 String bootSessionUUIDString()
 {
 #if OS(DARWIN)

Source/WTF/wtf/UUID.h

@@ -153,6 +153,7 @@ template<> struct DefaultHash<UUID> : UUIDHash { };
 // 9, A, or B for y.
 
 WTF_EXPORT_PRIVATE String createVersion4UUIDString();
+WTF_EXPORT_PRIVATE String createVersion4UUIDStringWeak();
 
 WTF_EXPORT_PRIVATE String bootSessionUUIDString();
 WTF_EXPORT_PRIVATE bool isVersion4UUID(StringView);
@@ -210,4 +211,5 @@ class StringTypeAdapter<UUID> {
 }
 
 using WTF::createVersion4UUIDString;
+using WTF::createVersion4UUIDStringWeak;
 using WTF::bootSessionUUIDString;

Source/WebCore/dom/Document.cpp

@@ -7182,7 +7182,7 @@ String Document::originIdentifierForPasteboard() const
     if (origin != "null"_s)
         return origin;
     if (!m_uniqueIdentifier)
-        m_uniqueIdentifier = makeString("null:"_s, WTF::UUID::createVersion4());
+        m_uniqueIdentifier = makeString("null:"_s, WTF::UUID::createVersion4Weak());
     return m_uniqueIdentifier;
 }
 
@@ -9653,7 +9653,7 @@ void Document::didInsertAttachmentElement(HTMLAttachmentElement& attachment)
     bool previousIdentifierIsNotUnique = !previousIdentifier.isEmpty() && m_attachmentIdentifierToElementMap.contains(previousIdentifier);
     if (identifier.isEmpty() || previousIdentifierIsNotUnique) {
         previousIdentifier = identifier;
-        identifier = createVersion4UUIDString();
+        identifier = createVersion4UUIDStringWeak();
         attachment.setUniqueIdentifier(identifier);
     }
 

Source/WebCore/platform/ScriptExecutionContextIdentifier.h

@@ -34,7 +34,7 @@ namespace WebCore {
 template <>
 class ProcessQualified<WTF::UUID> {
 public:
-    static ProcessQualified generate() { return { WTF::UUID::createVersion4(), Process::identifier() }; }
+    static ProcessQualified generate() { return { WTF::UUID::createVersion4Weak(), Process::identifier() }; }
 
     ProcessQualified()
         : m_object(WTF::UUID::emptyValue)