1 files changed, 26 insertions, 26 deletions

diff --git a/Source/WebCore/page/History.h b/Source/WebCore/page/History.h
index 1e8568594..e722a08be 100644
--- a/Source/WebCore/page/History.h
+++ b/Source/WebCore/page/History.h
@@ -10,10 +10,10 @@
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
@@ -23,56 +23,56 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef History_h
-#define History_h
+#pragma once
 
 #include "DOMWindowProperty.h"
+#include "ExceptionOr.h"
 #include "ScriptWrappable.h"
 #include "SerializedScriptValue.h"
-#include "URL.h"
-#include <wtf/Forward.h>
-#include <wtf/PassRefPtr.h>
-#include <wtf/RefCounted.h>
 
 namespace WebCore {
 
+class Document;
 class Frame;
-class ScriptExecutionContext;
-typedef int ExceptionCode;
+class URL;
 
-class History : public ScriptWrappable, public RefCounted<History>, public DOMWindowProperty {
+class History final : public ScriptWrappable, public RefCounted<History>, public DOMWindowProperty {
 public:
-    static PassRefPtr<History> create(Frame* frame) { return adoptRef(new History(frame)); }
+    static Ref<History> create(Frame& frame) { return adoptRef(*new History(frame)); }
 
     unsigned length() const;
-    PassRefPtr<SerializedScriptValue> state();
+    SerializedScriptValue* state();
     void back();
     void forward();
-    void go(int distance);
+    void go(int);
 
-    void back(ScriptExecutionContext*);
-    void forward(ScriptExecutionContext*);
-    void go(ScriptExecutionContext*, int distance);
+    void back(Document&);
+    void forward(Document&);
+    void go(Document&, int);
 
     bool stateChanged() const;
     bool isSameAsCurrentState(SerializedScriptValue*) const;
 
-    enum class StateObjectType {
-        Push,
-        Replace
-    };
-    void stateObjectAdded(PassRefPtr<SerializedScriptValue>, const String& title, const String& url, StateObjectType, ExceptionCode&);
+    enum class StateObjectType { Push, Replace };
+    ExceptionOr<void> stateObjectAdded(RefPtr<SerializedScriptValue>&&, const String& title, const String& url, StateObjectType);
 
 private:
-    explicit History(Frame*);
+    explicit History(Frame&);
 
     URL urlForState(const String& url);
 
-    PassRefPtr<SerializedScriptValue> stateInternal() const;
+    SerializedScriptValue* stateInternal() const;
 
     RefPtr<SerializedScriptValue> m_lastStateObjectRequested;
+
+    unsigned m_currentStateObjectTimeSpanObjectsAdded { 0 };
+    double m_currentStateObjectTimeSpanStart { 0.0 };
+
+    // For the main frame's History object to keep track of all state object usage.
+    uint64_t m_totalStateObjectUsage { 0 };
+
+    // For each individual History object to keep track of the most recent state object added.
+    uint64_t m_mostRecentStateObjectUsage { 0 };
 };
 
 } // namespace WebCore
-
-#endif // History_h