Additional context creation tracing

third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp

Index: third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp b/third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp
index 86f55cf43657623b7738f4277e8607888ead28f5..ab24aa797de98b0da53ffe448bff91520be6678b 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp
@@ -8,11 +8,13 @@
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
+#include "platform/TraceEvent.h"
 
 namespace blink {
 
 PassRefPtr<ScriptState> ScriptState::create(v8::Local<v8::Context> context, PassRefPtr<DOMWrapperWorld> world)
 {
+    TRACE_EVENT0("v8", "ScriptState::create");
     RefPtr<ScriptState> scriptState = adoptRef(new ScriptState(context, world));
     // This ref() is for keeping this ScriptState alive as long as the v8::Context is alive.
     // This is deref()ed in the weak callback of the v8::Context.