Convert //base to use std::unique_ptr

base/trace_event/common/trace_event_common.h

 // Copyright 2015 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.
 
 // This header file defines the set of trace_event macros without specifying
 // how the events actually get collected and stored. If you need to expose trace
 // events to some other universe, you can copy-and-paste this file as well as
 // trace_event.h, modifying the macros contained there as necessary for the
 // target platform. The end result is that multiple libraries can funnel events
 // through to a shared trace event collector.
@@ skipping 138 matching lines @@
 //     MyData() {}
 //     void AppendAsTraceFormat(std::string* out) const override {
 //       out->append("{\"foo\":1}");
 //     }
 //    private:
 //     ~MyData() override {}
 //     DISALLOW_COPY_AND_ASSIGN(MyData);
 //   };
 //
 //   TRACE_EVENT1("foo", "bar", "data",
-//                scoped_ptr<ConvertableToTraceFormat>(new MyData()));
+//                std::unique_ptr<ConvertableToTraceFormat>(new MyData()));
 //
 // The trace framework will take ownership if the passed pointer and it will
 // be free'd when the trace buffer is flushed.
 //
 // Note, we only do the conversion when the buffer is flushed, so the provided
 // data object should not be modified after it's passed to the trace framework.
 //
 //
 // Thread Safety:
 // A thread safe singleton and mutex are used for thread safety. Category
@@ skipping 918 matching lines @@
 
 // Enum reflecting the scope of an INSTANT event. Must fit within
 // TRACE_EVENT_FLAG_SCOPE_MASK.
 #define TRACE_EVENT_SCOPE_GLOBAL (static_cast<unsigned char>(0 << 3))
 #define TRACE_EVENT_SCOPE_PROCESS (static_cast<unsigned char>(1 << 3))
 #define TRACE_EVENT_SCOPE_THREAD (static_cast<unsigned char>(2 << 3))
 
 #define TRACE_EVENT_SCOPE_NAME_GLOBAL ('g')
 #define TRACE_EVENT_SCOPE_NAME_PROCESS ('p')
 #define TRACE_EVENT_SCOPE_NAME_THREAD ('t')