Remove OwnPtr from Blink.

third_party/WebKit/Source/platform/audio/HRTFDatabaseLoader.h

Index: third_party/WebKit/Source/platform/audio/HRTFDatabaseLoader.h
diff --git a/third_party/WebKit/Source/platform/audio/HRTFDatabaseLoader.h b/third_party/WebKit/Source/platform/audio/HRTFDatabaseLoader.h
index 2b63088067b4bfd42e63e1b0e08496bee6a330fb..bf8ec64e0df305027dde98a880216f757f247a7f 100644
--- a/third_party/WebKit/Source/platform/audio/HRTFDatabaseLoader.h
+++ b/third_party/WebKit/Source/platform/audio/HRTFDatabaseLoader.h
@@ -34,6 +34,7 @@
 #include "wtf/HashMap.h"
 #include "wtf/RefCounted.h"
 #include "wtf/ThreadingPrimitives.h"
+#include <memory>
 
 namespace blink {
 
@@ -76,9 +77,9 @@ private:
 
     // Holding a m_lock is required when accessing m_hrtfDatabase since we access it from multiple threads.
     Mutex m_lock;
-    OwnPtr<HRTFDatabase> m_hrtfDatabase;
+    std::unique_ptr<HRTFDatabase> m_hrtfDatabase;
 
-    OwnPtr<WebThread> m_thread;
+    std::unique_ptr<WebThread> m_thread;
 
     float m_databaseSampleRate;
 };