DevTools: Split creating inspector stylesheet and adding a new rule into stylesheet in protocol.

LayoutTests/http/tests/inspector-protocol/inspector-protocol-test.js

Index: LayoutTests/http/tests/inspector-protocol/inspector-protocol-test.js
diff --git a/LayoutTests/http/tests/inspector-protocol/inspector-protocol-test.js b/LayoutTests/http/tests/inspector-protocol/inspector-protocol-test.js
index 24d460e403ba003799ffa6782f1daccedf98c31b..9dc31f6321ef75076e9dd371400719266197e658 100644
--- a/LayoutTests/http/tests/inspector-protocol/inspector-protocol-test.js
+++ b/LayoutTests/http/tests/inspector-protocol/inspector-protocol-test.js
@@ -51,6 +51,21 @@ InspectorTest.sendCommand = function(method, params, handler)
     return this._requestId;
 }
 
+InspectorTest.sendCommandOrDie = function(command, properties, callback)
+{
+    InspectorTest.sendCommand(command, properties || {}, commandCallback);
+    function commandCallback(msg)
+    {
+        if (msg.error) {
+            InspectorTest.log("ERROR: " + msg.error.message);
+            InspectorTest.completeTest();
+            return;
+        }
+        if (callback)
+            callback(msg.result);
+    }
+}
+
 /**
  * @param {function(object)=} callback
  */
@@ -231,6 +246,46 @@ InspectorTest.importScript = function(scriptName)
     window.eval(xhr.responseText + "\n//@ sourceURL=" + scriptName);
 }
 
+InspectorTest.requestMainFrameId = function(callback)
+{
+    InspectorTest.sendCommandOrDie("Page.enable", {}, pageEnabled);
+
+    function pageEnabled()
+    {
+        InspectorTest.sendCommandOrDie("Page.getResourceTree", {}, resourceTreeLoaded);
+    }
+
+    function resourceTreeLoaded(payload)
+    {
+        callback(payload.frameTree.frame.id);
+    }
+};
+
+InspectorTest.requestDocumentNodeId = function(callback)
+{
+    InspectorTest.sendCommandOrDie("DOM.getDocument", {}, onGotDocument);
+
+    function onGotDocument(result)
+    {
+        callback(result.root.nodeId);
+    }
+};
+
+InspectorTest.requestNodeId = function(selector, callback)
+{
+    InspectorTest.requestDocumentNodeId(onGotDocumentNodeId);
+
+    function onGotDocumentNodeId(documentNodeId)
+    {
+        InspectorTest.sendCommandOrDie("DOM.querySelector", { "nodeId": documentNodeId , "selector": selector }, onGotNode);
+    }
+
+    function onGotNode(result)
+    {
+        callback(result.nodeId);
+    }
+};
+
 };
 
 var outputElement;