Defer loads in new pages/frames if ScopedPageLoadDeferral is active

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 f1aff24f70f0195ec8f20ae6326178d8892c8647..71c83104e397736e7214f911b59faa32001ca352 100644
--- a/third_party/WebKit/Source/core/loader/FrameLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/FrameLoader.cpp
@@ -204,6 +204,11 @@ void FrameLoader::init()
     m_provisionalDocumentLoader->startLoadingMainResource();
     m_frame->document()->cancelParsing();
     m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocument);
+    // Self-suspend if created in an already deferred Page. Note that both
+    // startLoadingMainResource() and cancelParsing() may have already detached
+    // the frame, since they both fire JS events.
+    if (m_frame->page() && m_frame->page()->defersLoading())
+        setDefersLoading(true);
     takeObjectSnapshot();
 }