compositor-worker: Introduce WebCompositorMutableState

third_party/WebKit/public/platform/WebPassOwnPtr.h

Index: third_party/WebKit/public/platform/WebPassOwnPtr.h
diff --git a/third_party/WebKit/public/platform/WebPassOwnPtr.h b/third_party/WebKit/public/platform/WebPassOwnPtr.h
index 217bd5404fe6e6ca6f1d9c0efefe2d58f254b097..9b2d34f5bd2c348b7202c8e23b52cd3ecfc43e56 100644
--- a/third_party/WebKit/public/platform/WebPassOwnPtr.h
+++ b/third_party/WebKit/public/platform/WebPassOwnPtr.h
@@ -10,6 +10,8 @@
 
 #if INSIDE_BLINK
 #include "wtf/PassOwnPtr.h"
+#else
+#include <base/memory/scoped_ptr.h>
 #endif
 
 namespace blink {
@@ -50,6 +52,13 @@ public:
         m_ptr = nullptr;
         return adoptPtr(ptr);
     }
+#else
+    operator scoped_ptr<T>()
+    {
+        T* ptr = m_ptr;
+        m_ptr = nullptr;
+        return scoped_ptr<T>(ptr);
+    }
 #endif // INSIDE_BLINK
 
     template <typename U> friend class WebPassOwnPtr;