Devtools:[CustomFormatter] Allow object tags in headers

LayoutTests/inspector/console/console-custom-formatters.html

Index: LayoutTests/inspector/console/console-custom-formatters.html
diff --git a/LayoutTests/inspector/console/console-custom-formatters.html b/LayoutTests/inspector/console/console-custom-formatters.html
index 09464db234f91358ca9f67cd6b9a8daf2a55ae19..4aa79c17fc737a7fa515992645864d51512ea691 100644
--- a/LayoutTests/inspector/console/console-custom-formatters.html
+++ b/LayoutTests/inspector/console/console-custom-formatters.html
@@ -53,14 +53,80 @@ var formatter2 = {
     }
 };
 
-window.devtoolsFormatters = [formatter1, formatter2];
+var configTest = {};
+var formatterWithConfig1 = {
+    header: function(x, config)
+    {
+        if (x !== configTest || config)
+            return null;
+
+        return ["span", {}, "Formatter with config ", ["object", {"object": x, "config": {"info": "additional info"}}]];
+    },
+
+    hasBody: function(x)
+    {
+        return false;
+    },
+
+    body: function(x)
+    {
+        throw "Unreachable"
+    }
+}
+
+var formatterWithConfig2 = {
+    header: function(x, config)
+    {
+        if (x !== configTest || !config)
+            return null;
+
+        return ["span", {}, "Header ", "info: ", config.info];
+    },
+
+    hasBody: function(x, config)
+    {
+        return config && config.info;
+    },
+
+    body: function(x, config)
+    {
+        return ["span", {}, "body", "info: ", config.info]
+    }
+}
+
+var selfReferenceTest = {};
+var selfReferencingFormatter = {
+    header: function(x)
+    {
+        if (x !== selfReferenceTest)
+            return null;
+
+        return ["span", {}, "Formatter with config ", ["object", {"object": x}]];
+    },
+
+    hasBody: function(x)
+    {
+        return false;
+    },
+
+    body: function(x)
+    {
+        throw "Unreachable"
+    }
+
+}
+
+window.devtoolsFormatters = [formatter1, formatter2, formatterWithConfig1, formatterWithConfig2, selfReferencingFormatter];
 
 function logVars()
 {
     console.log(a);
     console.log(b);
     console.log(c);
-    window.devtoolsFormatters = [formatter2, formatter1];
+    console.log(configTest);
+    console.log(selfReferenceTest);
+    //swap first formatters: test that header+body should be generated by the same formatter
+    window.devtoolsFormatters = [formatter2, formatter1, formatterWithConfig1, formatterWithConfig2, selfReferencingFormatter];
 }
 
 function test()