DevTools: Do not unbind stylesheets in multiframe documents

LayoutTests/inspector/styles/stylesheet-tracking.html

Index: LayoutTests/inspector/styles/stylesheet-tracking.html
diff --git a/LayoutTests/inspector/styles/stylesheet-tracking.html b/LayoutTests/inspector/styles/stylesheet-tracking.html
index ea25b3327137711c06efcc300b619e5999abb32e..f7f8265171be2a6b13bca7737ca885db849f1df1 100644
--- a/LayoutTests/inspector/styles/stylesheet-tracking.html
+++ b/LayoutTests/inspector/styles/stylesheet-tracking.html
@@ -32,6 +32,13 @@ function removeStyleSheet()
     document.head.removeChild(document.getElementById("style"));
 }
 
+function loadIframe()
+{
+    var iframe = document.createElement("iframe");
+    iframe.src = "resources/stylesheet-tracking-iframe.html";
+    document.body.appendChild(iframe);
+}
+
 function test()
 {
     var inspectorResource;
@@ -76,7 +83,8 @@ function test()
         function successCallback()
         {
             InspectorTest.addResult("Rule added");
-            InspectorTest.completeTest();
+            InspectorTest.evaluateInPage("loadIframe()");

[vsevik, 2013/05/07 08:11:47]

I would also test iframe removing as well.

+            waitStyleSheetAdded(1, step5);
         }
         function failureCallback()
         {
@@ -85,6 +93,11 @@ function test()
         }
     }
 
+    function step5()
+    {
+        InspectorTest.completeTest();
+    }
+
     var addedCallback;
     var addedSheetCount;
     var addedSheets = [];
@@ -97,6 +110,7 @@ function test()
 
     function styleSheetAdded(event)
     {
+        InspectorTest.addResult("styleSheetAdded");

[vsevik, 2013/05/07 08:11:47]

Let's replace this with an "Unexpected ..." message when addedSheetCount is
negative.

         var header = event.data;
         addedSheets.push(header);
         --addedSheetCount;
@@ -124,6 +138,7 @@ function test()
 
     function styleSheetRemoved(event)
     {
+        InspectorTest.addResult("styleSheetRemoved");
         var header = event.data;
         removedSheets.push(header);
         --removedSheetCount;