Remove ScriptController::updateDocument

third_party/WebKit/Source/core/loader/FrameLoader.cpp

Index: third_party/WebKit/Source/core/loader/FrameLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/FrameLoader.cpp b/third_party/WebKit/Source/core/loader/FrameLoader.cpp
index e330262b19fb0eb8426a68b995ee40a55ccb690f..e2ea33baa63b57e82e6e47517b82af9d463fefcb 100644
--- a/third_party/WebKit/Source/core/loader/FrameLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/FrameLoader.cpp
@@ -1751,8 +1751,10 @@ void FrameLoader::dispatchDidClearDocumentOfWindowObject() {
     return;
 
   Settings* settings = m_frame->settings();
-  if (settings && settings->forceMainWorldInitialization())
-    m_frame->script().initializeMainWorld();
+  if (settings && settings->forceMainWorldInitialization()) {
+    // Forcibly instantiate WindowProxy.

[Yuki, 2017/01/05 12:10:06]

This is a good comment!

Why don't we have similar comments in ScriptController.{h,cpp}?

+    m_frame->script().windowProxy(DOMWrapperWorld::mainWorld());
+  }
   InspectorInstrumentation::didClearDocumentOfWindowObject(m_frame);
 
   if (m_dispatchingDidClearWindowObjectInMainWorld)