[tracing] Adding class-wise memory statistics to blink gc memory dumps

Source/platform/heap/GCInfo.h

Index: Source/platform/heap/GCInfo.h
diff --git a/Source/platform/heap/GCInfo.h b/Source/platform/heap/GCInfo.h
index bcade77509418d32c065dd5e63d25ac615f09ec8..3ff9cc60c0b2d4765e0f752eb793cfe237383eb6 100644
--- a/Source/platform/heap/GCInfo.h
+++ b/Source/platform/heap/GCInfo.h
@@ -113,14 +113,13 @@ extern PLATFORM_EXPORT GCInfo const** s_gcInfoTable;
 struct GCInfo {
     bool hasFinalizer() const { return m_nonTrivialFinalizer; }
     bool hasVTable() const { return m_hasVTable; }
+    const String& className() const { return m_className; }
     TraceCallback m_trace;
     FinalizationCallback m_finalize;
     bool m_nonTrivialFinalizer;
     bool m_hasVTable;
-#if ENABLE(GC_PROFILING)
     // |m_className| is held as a reference to prevent dtor being called at exit.
     const String& m_className;
-#endif
 };
 
 #if ENABLE(ASSERT)
@@ -134,6 +133,8 @@ public:
     static void init();
     static void shutdown();
 
+    static size_t gcInfoIndex() { return s_gcInfoIndex; }
+
     // The (max + 1) GCInfo index supported.
     // We assume that 14 bits is enough to represent all possible types: during
     // telemetry runs, we see about 1000 different types, looking at the output
@@ -170,9 +171,7 @@ struct GCInfoAtBase {
             FinalizerTrait<T>::finalize,
             FinalizerTrait<T>::nonTrivialFinalizer,
             WTF::IsPolymorphic<T>::value,
-#if ENABLE(GC_PROFILING)
             TypenameStringTrait<T>::get()
-#endif
         };
         RETURN_GCINFO_INDEX();
     }