DevTools: migrate from OwnPtr to std::unique_ptr for inspector protocol classes.

third_party/WebKit/Source/platform/v8_inspector/public/V8StackTrace.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8StackTrace_h
 #define V8StackTrace_h
 
 #include "platform/inspector_protocol/TypeBuilder.h"
-#include "wtf/PassOwnPtr.h"
+#include "wtf/PtrUtil.h"
 
 #include <v8.h>
 
 namespace blink {
 
 class TracedValue;
 
 const v8::StackTrace::StackTraceOptions stackTraceOptions = static_cast<v8::StackTrace::StackTraceOptions>(
     v8::StackTrace::kLineNumber |
     v8::StackTrace::kColumnOffset |
     v8::StackTrace::kScriptId |
     v8::StackTrace::kScriptNameOrSourceURL |
     v8::StackTrace::kFunctionName);
 
 class V8StackTrace {
 public:
     static const size_t maxCallStackSizeToCapture = 200;
 
     virtual bool isEmpty() const = 0;
     virtual String16 topSourceURL() const = 0;
     virtual int topLineNumber() const = 0;
     virtual int topColumnNumber() const = 0;
     virtual String16 topScriptId() const = 0;
     virtual String16 topFunctionName() const = 0;
 
     virtual ~V8StackTrace() { }
-    virtual PassOwnPtr<protocol::Runtime::StackTrace> buildInspectorObject() const = 0;
+    virtual std::unique_ptr<protocol::Runtime::StackTrace> buildInspectorObject() const = 0;
     virtual String16 toString() const = 0;
-    virtual PassOwnPtr<V8StackTrace> clone() = 0;
+    virtual std::unique_ptr<V8StackTrace> clone() = 0;
 };
 
 } // namespace blink
 
 #endif // V8StackTrace_h