Not for review - Rebase of crrev.com/62833003

Source/platform/WebThreadOwnPtr.h

Index: Source/platform/WebThreadOwnPtr.h
diff --git a/Source/platform/WebThreadOwnPtr.h b/Source/platform/WebThreadOwnPtr.h
new file mode 100644
index 0000000000000000000000000000000000000000..d25c5935fa1a70a656ee902a0ba3bedf563400fe
--- /dev/null
+++ b/Source/platform/WebThreadOwnPtr.h
@@ -0,0 +1,21 @@
+#ifndef WEBTHREADOWNPTR
+#define WEBTHREADOWNPTR
+
+#include "WebThreadPtr.h"
+
+namespace blink {
+
+class WebThreadOwnPtr : public WebThreadPtr {
+  public:
+    WebThreadOwnPtr(WebThread* t) : m_ptr(adoptPtr(t)) {}
+    virtual WebThread& operator*() const { return *m_ptr.get(); }
+    virtual WebThread* operator->() const { return m_ptr.get(); }
+    virtual void clear() { m_ptr.clear(); }
+
+  private:
+    OwnPtr<WebThread> m_ptr;
+};
+
+}
+
+#endif /* ifndef WEBTHREADOWNPTR */