Defer loads in new pages/frames if ScopedPageLoadDeferral is active

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

Index: third_party/WebKit/Source/core/loader/DocumentLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
index 9e23b1a9187c4913ae9207a2e6136cd19addece2..9b431237967a73720f56f2faae6a0058a3b4afa8 100644
--- a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
@@ -275,7 +275,9 @@ void DocumentLoader::notifyFinished(Resource* resource)
 
 void DocumentLoader::finishedLoading(double finishTime)
 {
-    ASSERT(!m_frame->page()->defersLoading() || InspectorInstrumentation::isDebuggerPaused(m_frame));
+    DCHECK(m_frame->loader().stateMachine()->creatingInitialEmptyDocument()

[dcheng, 2016/07/25 06:48:18]

This is called during FrameLoader::init() to create the initial empty document.
It "should" be OK to allow this, as the document will always be same origin.

+        || !m_frame->page()->defersLoading()
+        || InspectorInstrumentation::isDebuggerPaused(m_frame));
 
     double responseEndTime = finishTime;
     if (!responseEndTime)