adjust blink::equalIgnoringFragmentIdentifier to work better for data:

Source/platform/weborigin/KURLTest.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 686 matching lines @@
         {"https://www.google.com/a?f#b", "https://www.google.com/a?f"},
     };
 
     for (size_t i = 0; i < ARRAYSIZE_UNSAFE(referrerCases); i++) {
         blink::KURL kurl(blink::ParsedURLString, referrerCases[i].input);
         WTF::String referrer = kurl.strippedForUseAsReferrer();
         EXPECT_STREQ(referrerCases[i].output, referrer.utf8().data());
     }
 }
 
+TEST(KURLTest, EqualIgnoringFragmentIdentifier)
+{
+    struct FragmentIdentifierCase {
+        const char* urlA;
+        const char* urlB;
+
+        bool equal;
+    } cases[] = {
+        {
+            "http://www.example.com/foo#bar",
+            "http://www.example.com/foo#baz",
+            true,
+        }, {
+            "http://www.example.com/foo#bar",
+            "https://www.example.com/foo#baz",
+            false,
+        }, {
+            "data:text/html;charset=utf-8,<!-- http://www.example.com/demo#a -->foo",
+            "data:text/html;charset=utf-8,<!-- http://www.example.com/demo#a -->bar",
+            false,
+        }, {
+            "data:text/html;charset=utf-8,bag",
+            "data:text/html;charset=utf-8,bag",
+            true,
+        },
+    };
+
+    for (size_t i = 0; i < ARRAYSIZE_UNSAFE(cases); i++) {
+        blink::KURL kurlA(blink::ParsedURLString, cases[i].urlA);
+        blink::KURL kurlB(blink::ParsedURLString, cases[i].urlB);
+        EXPECT_EQ(cases[i].equal, blink::equalIgnoringFragmentIdentifier(kurlA, kurlB));
+    }
+}
+
 } // namespace