Expose memory allocator internal stats and properties.

base/allocator/allocator_extension_thunks.cc

Index: base/allocator/allocator_extension_thunks.cc
diff --git a/base/allocator/allocator_extension_thunks.cc b/base/allocator/allocator_extension_thunks.cc
index 0e97f6af95bc6f9638fa3136fc9418c89c53955a..541b371a9c22b0d502e80a1b9fb644a6806baa77 100644
--- a/base/allocator/allocator_extension_thunks.cc
+++ b/base/allocator/allocator_extension_thunks.cc
@@ -17,9 +17,18 @@ namespace thunks {
 // can depend on it. This file can't depend on anything else in base, including
 // logging.
 
+static GetPropertyFunction* g_get_property_function = NULL;
 static GetStatsFunction* g_get_stats_function = NULL;
 static ReleaseFreeMemoryFunction* g_release_free_memory_function = NULL;
 
+void SetGetPropertyFunction(GetPropertyFunction* get_property_function) {
+  g_get_property_function = get_property_function;
+}
+
+GetPropertyFunction* GetGetPropertyFunction() {
+  return g_get_property_function;
+}
+
 void SetGetStatsFunction(GetStatsFunction* get_stats_function) {
   g_get_stats_function = get_stats_function;
 }