Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/platform/WebThreadSupportingGC.cpp

Index: third_party/WebKit/Source/platform/WebThreadSupportingGC.cpp
diff --git a/third_party/WebKit/Source/platform/WebThreadSupportingGC.cpp b/third_party/WebKit/Source/platform/WebThreadSupportingGC.cpp
index bb85da48a415342ec8811f2988c549eb38580682..6c7f2cdc59892948860ed27437d02258636d9f61 100644
--- a/third_party/WebKit/Source/platform/WebThreadSupportingGC.cpp
+++ b/third_party/WebKit/Source/platform/WebThreadSupportingGC.cpp
@@ -6,20 +6,18 @@
 
 #include "platform/heap/SafePoint.h"
 #include "public/platform/WebScheduler.h"
-#include "wtf/PtrUtil.h"
 #include "wtf/Threading.h"
-#include <memory>
 
 namespace blink {
 
-std::unique_ptr<WebThreadSupportingGC> WebThreadSupportingGC::create(const char* name, bool perThreadHeapEnabled)
+PassOwnPtr<WebThreadSupportingGC> WebThreadSupportingGC::create(const char* name, bool perThreadHeapEnabled)
 {
-    return wrapUnique(new WebThreadSupportingGC(name, nullptr, perThreadHeapEnabled));
+    return adoptPtr(new WebThreadSupportingGC(name, nullptr, perThreadHeapEnabled));
 }
 
-std::unique_ptr<WebThreadSupportingGC> WebThreadSupportingGC::createForThread(WebThread* thread, bool perThreadHeapEnabled)
+PassOwnPtr<WebThreadSupportingGC> WebThreadSupportingGC::createForThread(WebThread* thread, bool perThreadHeapEnabled)
 {
-    return wrapUnique(new WebThreadSupportingGC(nullptr, thread, perThreadHeapEnabled));
+    return adoptPtr(new WebThreadSupportingGC(nullptr, thread, perThreadHeapEnabled));
 }
 
 WebThreadSupportingGC::WebThreadSupportingGC(const char* name, WebThread* thread, bool perThreadHeapEnabled)
@@ -34,7 +32,7 @@ WebThreadSupportingGC::WebThreadSupportingGC(const char* name, WebThread* thread
 #endif
     if (!m_thread) {
         // If |thread| is not given, create a new one and own it.
-        m_owningThread = wrapUnique(Platform::current()->createThread(name));
+        m_owningThread = adoptPtr(Platform::current()->createThread(name));
         m_thread = m_owningThread.get();
     }
 }
@@ -51,7 +49,7 @@ WebThreadSupportingGC::~WebThreadSupportingGC()
 void WebThreadSupportingGC::initialize()
 {
     ThreadState::attachCurrentThread(m_perThreadHeapEnabled);
-    m_gcTaskRunner = wrapUnique(new GCTaskRunner(m_thread));
+    m_gcTaskRunner = adoptPtr(new GCTaskRunner(m_thread));
 }
 
 void WebThreadSupportingGC::shutdown()