[Tracing] Make heap profiler type info a string

base/trace_event/memory_dump_session_state.h

Index: base/trace_event/memory_dump_session_state.h
diff --git a/base/trace_event/memory_dump_session_state.h b/base/trace_event/memory_dump_session_state.h
index 8a0320791b529a681803780c6c3e97ae65435d6c..6834471b9a760db062ba02cd1ef6d4f39d3082fe 100644
--- a/base/trace_event/memory_dump_session_state.h
+++ b/base/trace_event/memory_dump_session_state.h
@@ -8,6 +8,7 @@
 #include "base/base_export.h"
 #include "base/memory/ref_counted.h"
 #include "base/trace_event/heap_profiler_stack_frame_deduplicator.h"
+#include "base/trace_event/heap_profiler_type_name_deduplicator.h"
 
 namespace base {
 namespace trace_event {
@@ -18,7 +19,8 @@ class BASE_EXPORT MemoryDumpSessionState
     : public RefCountedThreadSafe<MemoryDumpSessionState> {
  public:
   MemoryDumpSessionState(
-      const scoped_refptr<StackFrameDeduplicator>& stack_frame_deduplicator);
+      const scoped_refptr<StackFrameDeduplicator>& stack_frame_deduplicator,
+      const scoped_refptr<TypeNameDeduplicator>& type_name_deduplicator);
 
   // Returns the stack frame deduplicator that should be used by memory dump
   // providers when doing a heap dump.
@@ -26,6 +28,12 @@ class BASE_EXPORT MemoryDumpSessionState
     return stack_frame_deduplicator_.get();
   }
 
+  // Returns the type name deduplicator that should be used by memory dump
+  // providers when doing a heap dump.
+  TypeNameDeduplicator* type_name_deduplicator() {
+    return type_name_deduplicator_.get();
+  }
+
  private:
   friend class RefCountedThreadSafe<MemoryDumpSessionState>;
   ~MemoryDumpSessionState();
@@ -33,6 +41,10 @@ class BASE_EXPORT MemoryDumpSessionState
   // Deduplicates backtraces in heap dumps so they can be written once when the
   // trace is finalized.
   scoped_refptr<StackFrameDeduplicator> stack_frame_deduplicator_;
+
+  // Deduplicates type names in heap dumps so they can be written once when the
+  // trace is finalized.
+  scoped_refptr<TypeNameDeduplicator> type_name_deduplicator_;
 };
 
 }  // namespace trace_event