adjust blink::equalIgnoringFragmentIdentifier to work better for data:

Source/platform/weborigin/KURL.cpp

Index: Source/platform/weborigin/KURL.cpp
diff --git a/Source/platform/weborigin/KURL.cpp b/Source/platform/weborigin/KURL.cpp
index b8513b0cf8ffe9026517d40647c3d039e0fc9efc..c92c06c370ef513c215b45589769a0530d5dd782 100644
--- a/Source/platform/weborigin/KURL.cpp
+++ b/Source/platform/weborigin/KURL.cpp
@@ -707,6 +707,9 @@ void KURL::print() const
 
 bool equalIgnoringFragmentIdentifier(const KURL& a, const KURL& b)
 {
+    if (a.protocolIsData() && b.protocolIsData())
+        return a.m_string == b.m_string;
+
     // Compute the length of each URL without its ref. Note that the reference
     // begin (if it exists) points to the character *after* the '#', so we need
     // to subtract one.