Don't cache MemoryInfo instance on ConsoleMemory object.

Source/core/timing/ConsoleMemory.cpp

Index: Source/core/timing/ConsoleMemory.cpp
diff --git a/Source/core/timing/ConsoleMemory.cpp b/Source/core/timing/ConsoleMemory.cpp
index a44ff10768fc91eeadd6e65aae0bcfb7bc4f3b05..bd1bdf74812d211979bee990d4872c5dfb07ac2c 100644
--- a/Source/core/timing/ConsoleMemory.cpp
+++ b/Source/core/timing/ConsoleMemory.cpp
@@ -10,12 +10,6 @@
 
 namespace blink {
 
-DEFINE_TRACE(ConsoleMemory)
-{
-    visitor->trace(m_memory);
-    HeapSupplement<Console>::trace(visitor);
-}
-
 // static
 ConsoleMemory& ConsoleMemory::from(Console& console)
 {
@@ -35,10 +29,7 @@ MemoryInfo* ConsoleMemory::memory(Console& console)
 
 MemoryInfo* ConsoleMemory::memory()
 {
-    if (!m_memory)
-        m_memory = MemoryInfo::create();
-
-    return m_memory.get();
+    return MemoryInfo::create();
 }
 
 } // namespace blink