Use Shadow DOM to display fallback content for images

LayoutTests/http/tests/inspector/network/network-image-404.html

Index: LayoutTests/http/tests/inspector/network/network-image-404.html
diff --git a/LayoutTests/http/tests/inspector/network/network-image-404.html b/LayoutTests/http/tests/inspector/network/network-image-404.html
index 45c0021f5f786a631b94315043c126c3ead975c3..7619528cb9c74d121568dcbd53b2bcc1b3775ab2 100644
--- a/LayoutTests/http/tests/inspector/network/network-image-404.html
+++ b/LayoutTests/http/tests/inspector/network/network-image-404.html
@@ -40,8 +40,14 @@ function test()
 
     function step3()
     {
-        var request1 = InspectorTest.networkRequests().pop();
-        InspectorTest.addResult("resource.content after requesting content: " + request1.content);
+        var requests = InspectorTest.networkRequests();
+        requests.sort(function(a, b) {return a.url.localeCompare(b.url);});
+        InspectorTest.addResult("resources count = " + requests.length);
+        for (i = 0; i < requests.length; i++) {
+            InspectorTest.addResult(requests[i].url);
+            InspectorTest.addResult("resource.content after requesting content: " + requests[i].content);
+        }
+
 
         InspectorTest.completeTest();
     }