[tracing] Switch to new heap dump format.

base/trace_event/trace_event_memory_overhead.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.
 
 #ifndef BASE_TRACE_EVENT_TRACE_EVENT_MEMORY_OVERHEAD_H_
 #define BASE_TRACE_EVENT_TRACE_EVENT_MEMORY_OVERHEAD_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 18 matching lines @@
     kOther = 0,
     kTraceBuffer,
     kTraceBufferChunk,
     kTraceEvent,
     kUnusedTraceEvent,
     kTracedValue,
     kConvertableToTraceFormat,
     kHeapProfilerAllocationRegister,
     kHeapProfilerTypeNameDeduplicator,
     kHeapProfilerStackFrameDeduplicator,
+    kHeapProfilerStringDeduplicator,
     kStdString,
     kBaseValue,
     kTraceEventMemoryOverhead,
     kLast
   };
 
   TraceEventMemoryOverhead();
   ~TraceEventMemoryOverhead();
 
   // Use this method to account the overhead of an object for which an estimate
@@ skipping 36 matching lines @@
                    size_t allocated_size_in_bytes,
                    size_t resident_size_in_bytes);
 
   DISALLOW_COPY_AND_ASSIGN(TraceEventMemoryOverhead);
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_TRACE_EVENT_MEMORY_OVERHEAD_H_