Speculative fix for null m_documentLoader in restoreScrollPositionAndViewState.

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 d0c6f2176eeb22d6831d589ca52935a4299cf71f..06ef809c66abecc81a797923acca2df8b2518ec5 100644
--- a/third_party/WebKit/Source/core/loader/FrameLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/FrameLoader.cpp
@@ -1118,8 +1118,14 @@ FrameLoadType FrameLoader::loadType() const
 void FrameLoader::restoreScrollPositionAndViewState()
 {
     FrameView* view = m_frame->view();
-    if (!m_frame->page() || !view || !view->layoutViewportScrollableArea() || !m_currentItem || !m_stateMachine.committedFirstRealDocumentLoad())
+    if (!m_frame->page()
+        || !view
+        || !view->layoutViewportScrollableArea()
+        || !m_currentItem
+        || !m_stateMachine.committedFirstRealDocumentLoad()
+        || !documentLoader()) {
         return;
+    }
 
     if (!needsHistoryItemRestore(m_loadType))
         return;