Make event names of TRACE_EVENT_SAMPLING_STATE macros more descriptive

Source/bindings/templates/interface.cpp

 {% extends 'interface_base.cpp' %}
 
 
 {##############################################################################}
 {% macro attribute_configuration(attribute) %}
 {% set getter_callback =
        '%sV8Internal::%sAttributeGetterCallback' %
             (cpp_class, attribute.name)
        if not attribute.constructor_type else
        '{0}V8Internal::{0}ConstructorGetter'.format(interface_name) %}
@@ skipping 103 matching lines @@
         return;
     }
 
     info.This()->SetHiddenValue(name, jsValue);
 }
 
 static void {{cpp_class}}OriginSafeMethodSetterCallback(v8::Local<v8::String> name, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     {{cpp_class}}V8Internal::{{cpp_class}}OriginSafeMethodSetter(name, jsValue, info);
-    TRACE_EVENT_SET_SAMPLING_STATE("V8", "Execution");
+    TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 {% endif %}
 {% endblock %}
 
 
 {##############################################################################}
 {% from 'methods.cpp' import named_constructor_callback with context %}
 {% block named_constructor %}
 {% if named_constructor %}
@@ skipping 614 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline({{cpp_class}}* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 {% endblock %}