Instrumentations to trace Swarm startup.

Source/WebCore/bindings/dart/DartController.cpp

Index: Source/WebCore/bindings/dart/DartController.cpp
diff --git a/Source/WebCore/bindings/dart/DartController.cpp b/Source/WebCore/bindings/dart/DartController.cpp
index 90e1511ef536407c97502caf801010c302d3787d..1ccee8b5585ab7da614339d9d59c04ae3c588b7c 100644
--- a/Source/WebCore/bindings/dart/DartController.cpp
+++ b/Source/WebCore/bindings/dart/DartController.cpp
@@ -44,6 +44,7 @@
 #include "HTMLNames.h"
 #include "HTMLScriptElement.h"
 #include "IDBPendingTransactionMonitor.h"
+#include "InspectorInstrumentation.h"
 #include "NodeList.h"
 #include "Page.h"
 #include "PageGroup.h"
@@ -57,6 +58,22 @@
 
 namespace WebCore {
 
+class Timeline {
+public:
+    Timeline(Frame* frame, String tag)
+    {
+        m_cookie = InspectorInstrumentation::willEvaluateScript(frame, tag, 0);
+    }
+
+    ~Timeline()
+    {
+        InspectorInstrumentation::didEvaluateScript(m_cookie);
+    }
+
+private:
+    InspectorInstrumentationCookie m_cookie;
+};
+
 static void initDOMIsolate()
 {
     DartApiScope dartApiScope;
@@ -265,6 +282,7 @@ void DartController::evaluate(const ScriptSourceCode& sourceCode)
 
 void DartController::loadScripts()
 {
+    Timeline timeline(frame(), "DC::loadScripts");
     initVMIfNeeded();
 
     Vector<RefPtr<HTMLScriptElement> > dartScripts;