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

Source/core/loader/HistoryItem.h

Index: Source/core/loader/HistoryItem.h
diff --git a/Source/core/loader/HistoryItem.h b/Source/core/loader/HistoryItem.h
index 1a94d0f135a38cc499271e6712a5f034cb0efaf0..c4f80b01541e52e14aa85b9122a8e56e9b3ee16f 100644
--- a/Source/core/loader/HistoryItem.h
+++ b/Source/core/loader/HistoryItem.h
@@ -97,6 +97,9 @@ public:
     void setFrameSequenceNumber(long long number) { m_frameSequenceNumber = number; }
     long long frameSequenceNumber() const { return m_frameSequenceNumber; }
 
+    void setIsCreatedByHistoryAPI(bool isCreatedByHistoryAPI) { m_isCreatedByHistoryAPI = isCreatedByHistoryAPI; }
+    bool isCreatedByHistoryAPI() { return m_isCreatedByHistoryAPI; }
+
     void setFormInfoFromRequest(const ResourceRequest&);
     void setFormData(PassRefPtr<FormData>);
     void setFormContentType(const AtomicString&);
@@ -135,6 +138,9 @@ private:
     // one during a history navigation.
     int64_t m_frameSequenceNumber;
 
+    // True if history item was created via JS History API

[tdresser, 2015/02/26 18:04:02]

Add period at EOL.

+    bool m_isCreatedByHistoryAPI;
+
     // Support for HTML5 History
     RefPtr<SerializedScriptValue> m_stateObject;