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

Source/wtf/InstanceCounter.cpp

Index: Source/wtf/InstanceCounter.cpp
diff --git a/Source/wtf/InstanceCounter.cpp b/Source/wtf/InstanceCounter.cpp
index dbaee9eb7f2bcad761cb554c0f651d3630bc0e6f..f3d0c3a8416fb36f3803dad60e557fada4515ced 100644
--- a/Source/wtf/InstanceCounter.cpp
+++ b/Source/wtf/InstanceCounter.cpp
@@ -35,8 +35,6 @@
 
 namespace WTF {
 
-#if ENABLE(INSTANCE_COUNTER) || ENABLE(GC_PROFILING)
-
 #if COMPILER(CLANG)
 const size_t extractNameFunctionPrefixLength = sizeof("const char *WTF::extractNameFunction() [T = ") - 1;
 const size_t extractNameFunctionPostfixLength = sizeof("]") - 1;
@@ -65,6 +63,8 @@ String extractTypeNameFromFunctionName(const char* funcName)
 #endif
 }
 
+#if ENABLE(INSTANCE_COUNTER) || ENABLE(GC_PROFILING)
+
 class InstanceCounter {
 public:
     void incrementInstanceCount(const String& instanceName, void* ptr);