Make event names of TRACE_EVENT_SAMPLING_STATE macros more descriptive

Source/bindings/templates/methods.cpp

 {##############################################################################}
 {% macro generate_method(method, world_suffix) %}
 {% filter conditional(method.conditional_string) %}
 static void {{method.name}}{{method.overload_index}}Method{{world_suffix}}(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     {% if method.has_exception_state %}
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "{{method.name}}", "{{interface_name}}", info.Holder(), info.GetIsolate());
     {% endif %}
     {% if method.name in ['addEventListener', 'removeEventListener'] %}
     {{add_remove_event_listener_method(method.name) | indent}}
@@ skipping 242 matching lines @@
            and delete toVectorOfArguments #}
         Vector<v8::Handle<v8::Value> > loggerArgs = toNativeArguments<v8::Handle<v8::Value> >(info, 0);
         contextData->activityLogger()->log("{{interface_name}}.{{method.name}}", info.Length(), loggerArgs.data(), "Method");
     }
     {% endif %}
     {% if method.is_custom %}
     {{v8_class}}::{{method.name}}MethodCustom(info);
     {% else %}
     {{cpp_class}}V8Internal::{{method.name}}Method{{world_suffix}}(info);
     {% endif %}
-    TRACE_EVENT_SET_SAMPLING_STATE("V8", "Execution");
+    TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 {% endfilter %}
 {% endmacro %}
 
 
 {##############################################################################}
 {% macro origin_safe_method_getter(method, world_suffix) %}
 static void {{method.name}}OriginSafeMethodGetter{{world_suffix}}(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     {# FIXME: don't call GetIsolate() so often #}
@@ skipping 25 matching lines @@
         return;
     }
 
     v8SetReturnValue(info, privateTemplate->GetFunction());
 }
 
 static void {{method.name}}OriginSafeMethodGetterCallback{{world_suffix}}(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     {{cpp_class}}V8Internal::{{method.name}}OriginSafeMethodGetter{{world_suffix}}(info);
-    TRACE_EVENT_SET_SAMPLING_STATE("V8", "Execution");
+    TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 {% endmacro %}
 
 
 {##############################################################################}
 {% macro generate_constructor(constructor) %}
 static void constructor{{constructor.overload_index}}(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     {% if interface_length and not constructor.overload_index %}
     {# FIXME: remove this UNLIKELY: constructors are heavy, so no difference. #}
@@ skipping 70 matching lines @@
     v8::Handle<v8::Object> wrapper = info.Holder();
     {% if is_constructor_raises_exception %}
     if (exceptionState.throwIfNeeded())
         return;
     {% endif %}
 
     V8DOMWrapper::associateObjectWithWrapper<{{v8_class}}>(impl.release(), &{{v8_class}}Constructor::wrapperTypeInfo, wrapper, info.GetIsolate(), WrapperConfiguration::Dependent);
     v8SetReturnValue(info, wrapper);
 }
 {% endmacro %}