[tracing] Use EstimateMemoryUsage() in deduplicators.

base/trace_event/heap_profiler_stack_frame_deduplicator.h

Index: base/trace_event/heap_profiler_stack_frame_deduplicator.h
diff --git a/base/trace_event/heap_profiler_stack_frame_deduplicator.h b/base/trace_event/heap_profiler_stack_frame_deduplicator.h
index 4932534e1d790a578290effd9590bc0fe43a64bb..66d430f2ee32572aa0732c4105de410a3ac4db27 100644
--- a/base/trace_event/heap_profiler_stack_frame_deduplicator.h
+++ b/base/trace_event/heap_profiler_stack_frame_deduplicator.h
@@ -34,6 +34,8 @@ class BASE_EXPORT StackFrameDeduplicator : public ConvertableToTraceFormat {
     FrameNode(const FrameNode& other);
     ~FrameNode();
 
+    size_t EstimateMemoryUsage() const;
+
     StackFrame frame;
 
     // The index of the parent stack frame in |frames_|, or -1 if there is no