Replaced RefPtr::release with std::move in Source/core.

third_party/WebKit/Source/core/loader/PingLoader.cpp

Index: third_party/WebKit/Source/core/loader/PingLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/PingLoader.cpp b/third_party/WebKit/Source/core/loader/PingLoader.cpp
index 5e597c1f61d60f62421c672c0715be6baab01c4a..9a9fa8094d67fd34fe0383c76aaf29974f897208 100644
--- a/third_party/WebKit/Source/core/loader/PingLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/PingLoader.cpp
@@ -125,7 +125,7 @@ class BeaconBlob final : public Beacon {
     else
       entityBody->appendBlob(m_data->uuid(), m_data->blobDataHandle());
 
-    request.setHTTPBody(entityBody.release());
+    request.setHTTPBody(std::move(entityBody));
 
     if (!m_contentType.isEmpty())
       request.setHTTPContentType(m_contentType);
@@ -149,7 +149,7 @@ class BeaconDOMArrayBufferView final : public Beacon {
 
     RefPtr<EncodedFormData> entityBody =
         EncodedFormData::create(m_data->baseAddress(), m_data->byteLength());
-    request.setHTTPBody(entityBody.release());
+    request.setHTTPBody(std::move(entityBody));
 
     // FIXME: a reasonable choice, but not in the spec; should it give a
     // default?