Oilpan: GC_TRACING: Improve object path dump

Source/wtf/Assertions.h

Index: Source/wtf/Assertions.h
diff --git a/Source/wtf/Assertions.h b/Source/wtf/Assertions.h
index 7f57c8951f51632f4d236417e06572928ea85454..c1c5bd344eda48212ddc8fa1be966a46cfd02aee 100644
--- a/Source/wtf/Assertions.h
+++ b/Source/wtf/Assertions.h
@@ -120,6 +120,23 @@ WTF_EXPORT void WTFInstallReportBacktraceOnCrashHook();
 
 #ifdef __cplusplus
 }
+
+namespace WTF {
+
+class WTF_EXPORT FrameToNameScope {
+public:
+    explicit FrameToNameScope(void*);
+    ~FrameToNameScope();
+    const char* nullableName() { return m_name; }
+
+private:
+    const char* m_name;
+    char* m_cxaDemangled;
+};
+
+} // namespace WTF
+
+using WTF::FrameToNameScope;
 #endif
 
 /* IMMEDIATE_CRASH() - Like CRASH() below but crashes in the fastest, simplest possible way with no attempt at logging. */