Remove OwnPtr from Blink.

third_party/WebKit/Source/platform/heap/GCTaskRunner.h

Index: third_party/WebKit/Source/platform/heap/GCTaskRunner.h
diff --git a/third_party/WebKit/Source/platform/heap/GCTaskRunner.h b/third_party/WebKit/Source/platform/heap/GCTaskRunner.h
index d2a37098854e979c6b2e68ad5b454a62c791d05b..8ef05d6854fb04fd54d7bb1d1aa49667e2d8dc72 100644
--- a/third_party/WebKit/Source/platform/heap/GCTaskRunner.h
+++ b/third_party/WebKit/Source/platform/heap/GCTaskRunner.h
@@ -36,6 +36,8 @@
 #include "public/platform/WebTaskRunner.h"
 #include "public/platform/WebThread.h"
 #include "public/platform/WebTraceLocation.h"
+#include "wtf/PtrUtil.h"
+#include <memory>
 
 namespace blink {
 
@@ -100,11 +102,11 @@ class GCTaskRunner final {
     USING_FAST_MALLOC(GCTaskRunner);
 public:
     explicit GCTaskRunner(WebThread* thread)
-        : m_gcTaskObserver(adoptPtr(new GCTaskObserver))
+        : m_gcTaskObserver(wrapUnique(new GCTaskObserver))
         , m_thread(thread)
     {
         m_thread->addTaskObserver(m_gcTaskObserver.get());
-        ThreadState::current()->addInterruptor(adoptPtr(new MessageLoopInterruptor(thread->getWebTaskRunner())));
+        ThreadState::current()->addInterruptor(wrapUnique(new MessageLoopInterruptor(thread->getWebTaskRunner())));
     }
 
     ~GCTaskRunner()
@@ -113,7 +115,7 @@ public:
     }
 
 private:
-    OwnPtr<GCTaskObserver> m_gcTaskObserver;
+    std::unique_ptr<GCTaskObserver> m_gcTaskObserver;
     WebThread* m_thread;
 };