Simplify setting lockBackForwardList() in NavigationScheduler.

Source/core/loader/FrameLoaderStateMachine.cpp

Index: Source/core/loader/FrameLoaderStateMachine.cpp
diff --git a/Source/core/loader/FrameLoaderStateMachine.cpp b/Source/core/loader/FrameLoaderStateMachine.cpp
index 2ad0e231cb7e09019131c3f11665c77e799b55b7..61db0ef4cceec49c27e68d0ca943338984fe5d20 100644
--- a/Source/core/loader/FrameLoaderStateMachine.cpp
+++ b/Source/core/loader/FrameLoaderStateMachine.cpp
@@ -46,7 +46,7 @@ bool FrameLoaderStateMachine::startedFirstRealLoad() const
 
 bool FrameLoaderStateMachine::committedFirstRealDocumentLoad() const
 {
-    return m_state == CommittedFirstRealLoad;
+    return m_state >= CommittedFirstRealLoad;
 }
 
 bool FrameLoaderStateMachine::creatingInitialEmptyDocument() const
@@ -54,6 +54,11 @@ bool FrameLoaderStateMachine::creatingInitialEmptyDocument() const
     return m_state == CreatingInitialEmptyDocument;
 }
 
+bool FrameLoaderStateMachine::committedMultipleRealLoads() const
+{
+    return m_state == CommittedMultipleRealLoads;
+}
+
 bool FrameLoaderStateMachine::isDisplayingInitialEmptyDocument() const
 {
     return m_state >= DisplayingInitialEmptyDocument && m_state < CommittedFirstRealLoad;