Revert of Fix Blink commit type for subframes after initial about:blank load.

Source/web/WebLocalFrameImpl.cpp

Index: Source/web/WebLocalFrameImpl.cpp
diff --git a/Source/web/WebLocalFrameImpl.cpp b/Source/web/WebLocalFrameImpl.cpp
index b331d646191b25c87551737f749177fef9c86d54..ab13d530431e1dd3f53ade03028c7b33ef594a4f 100644
--- a/Source/web/WebLocalFrameImpl.cpp
+++ b/Source/web/WebLocalFrameImpl.cpp
@@ -1948,12 +1948,10 @@
 
 static void ensureFrameLoaderHasCommitted(FrameLoader& frameLoader)
 {
-    // Internally, Blink uses CommittedMultipleRealLoads to track whether the
-    // next commit should create a new history item or not. Ensure we have
-    // reached that state.
-    if (frameLoader.stateMachine()->committedMultipleRealLoads())
+    if (frameLoader.stateMachine()->committedFirstRealDocumentLoad())
         return;
-    frameLoader.stateMachine()->advanceTo(FrameLoaderStateMachine::CommittedMultipleRealLoads);
+    frameLoader.stateMachine()->advanceTo(frameLoader.client()->backForwardLength() > 1 ?
+        FrameLoaderStateMachine::CommittedMultipleRealLoads : FrameLoaderStateMachine::CommittedFirstRealLoad);
 }
 
 void WebLocalFrameImpl::initializeToReplaceRemoteFrame(WebRemoteFrame* oldWebFrame, const WebString& name, WebSandboxFlags flags)