Merge DevTools Refactor CL to Blink36

Source/bindings/common/StackTrace.h

Index: Source/bindings/common/StackTrace.h
diff --git a/Source/bindings/common/StackTrace.h b/Source/bindings/common/StackTrace.h
new file mode 100644
index 0000000000000000000000000000000000000000..e08bb4171b2713a30d5c7cc23f03ec8fd0ed4c84
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+++ b/Source/bindings/common/StackTrace.h
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+/*
+ * Copyright (C) 2014 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 THE COPYRIGHT
+ * OWNER 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 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef StackTrace_h
+#define StackTrace_h
+
+#include "bindings/common/ScriptValue.h"
+#include <dart_debugger_api.h>
+
+namespace WebCore {
+
+class JSONValue;
+class ScriptState;
+class V8ScriptState;
+
+class StackTrace {
+public:
+    explicit StackTrace()
+    {
+        m_isJavaScript = true;
+        m_dartStackTrace = 0;
+    }
+
+    explicit StackTrace(const ScriptValue& stackTrace)
+    {
+        m_isJavaScript = true;
+        m_scriptValue = stackTrace;
+        m_dartStackTrace = 0;
+    }
+
+    explicit StackTrace(Dart_StackTrace stackTrace)
+    {
+        m_isJavaScript = false;
+        m_dartStackTrace = stackTrace;
+    }
+
+    bool isJavaScript() const
+    {
+        return m_isJavaScript;
+    }
+
+    ScriptValue asJavaScript() const
+    {
+        ASSERT(m_isJavaScript);
+        return m_scriptValue;
+    }
+
+    Dart_StackTrace asDart() const
+    {
+        ASSERT(!m_isJavaScript);
+        return m_dartStackTrace;
+    }
+
+    bool isNull() const
+    {
+        return m_isJavaScript ? m_scriptValue.isNull() : !m_dartStackTrace;
+    }
+
+private:
+    bool m_isJavaScript;
+    ScriptValue m_scriptValue;
+    Dart_StackTrace m_dartStackTrace;
+};
+
+class ActivationFrame {
+public:
+    explicit ActivationFrame()
+    {
+        m_isJavaScript = true;
+        m_dartActivationFrame = 0;
+    }
+
+    explicit ActivationFrame(const ScriptValue& activationFrame)
+    {
+        m_isJavaScript = true;
+        m_scriptValue = activationFrame;
+        m_dartActivationFrame = 0;
+    }
+
+    explicit ActivationFrame(Dart_ActivationFrame activationFrame)
+    {
+        m_isJavaScript = false;
+        m_dartActivationFrame = activationFrame;
+    }
+
+    bool isJavaScript() const { return m_isJavaScript; }
+    ScriptValue asJavaScript() const
+    {
+        ASSERT(m_isJavaScript);
+        return m_scriptValue;
+    }
+
+    Dart_ActivationFrame asDart() const
+    {
+        ASSERT(!m_isJavaScript);
+        return m_dartActivationFrame;
+    }
+
+private:
+    bool m_isJavaScript;
+    ScriptValue m_scriptValue;
+    Dart_ActivationFrame m_dartActivationFrame;
+};
+
+} // namespace WebCore
+
+#endif // StackTrace_h