Accept options in history APIs to allow scroll restoration to be disabled

Source/core/loader/FrameLoader.h

Index: Source/core/loader/FrameLoader.h
diff --git a/Source/core/loader/FrameLoader.h b/Source/core/loader/FrameLoader.h
index 02bdeae7a686f4dd0495b59988ca710e68996c20..4adda844855291ad30b13ce921de49848ad4b99c 100644
--- a/Source/core/loader/FrameLoader.h
+++ b/Source/core/loader/FrameLoader.h
@@ -168,7 +168,7 @@ public:
 
     bool allowPlugins(ReasonForCallingAllowPlugins);
 
-    void updateForSameDocumentNavigation(const KURL&, SameDocumentNavigationSource, PassRefPtr<SerializedScriptValue>, FrameLoadType);
+    void updateForSameDocumentNavigation(const KURL&, SameDocumentNavigationSource, PassRefPtr<SerializedScriptValue>, bool shouldRestoreScroll, FrameLoadType);

[Nate Chapin, 2015/05/07 20:26:59]

This would ideally be an enum.

 
     HistoryItem* currentItem() const { return m_currentItem.get(); }
     void saveScrollState();
@@ -197,7 +197,7 @@ private:
     bool validateTransitionNavigationMode();
     bool dispatchNavigationTransitionData();
 
-    void setHistoryItemStateForCommit(HistoryCommitType, bool isPushOrReplaceState = false, PassRefPtr<SerializedScriptValue> = nullptr);
+    void setHistoryItemStateForCommit(HistoryCommitType, bool isPushOrReplaceState = false, bool shouldRestoreScroll = true, PassRefPtr<SerializedScriptValue> = nullptr);
 
     void loadInSameDocument(const KURL&, PassRefPtr<SerializedScriptValue> stateObject, FrameLoadType, ClientRedirectPolicy);