adjust blink::equalIgnoringFragmentIdentifier to work better for data:

Source/platform/weborigin/KURLTest.cpp

Index: Source/platform/weborigin/KURLTest.cpp
diff --git a/Source/platform/weborigin/KURLTest.cpp b/Source/platform/weborigin/KURLTest.cpp
index 7162c946c513dc8aee68f0d1da66b668c5186bba..f9c324014010c417dde040ec5a563dd8d53b92c7 100644
--- a/Source/platform/weborigin/KURLTest.cpp
+++ b/Source/platform/weborigin/KURLTest.cpp
@@ -704,4 +704,38 @@ TEST(KURLTest, strippedForUseAsReferrer)
     }
 }
 
+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