Explicitly ShutdownOnUIThread the HostContentSettingsMap when destroying the Profile.

base/values.cc

Index: base/values.cc
diff --git a/base/values.cc b/base/values.cc
index 0f30e379eb3301d915c0b06d1c78066fa993f10f..adfc9a8c7c10f100f23461cf93f75bc2cd47f836 100644
--- a/base/values.cc
+++ b/base/values.cc
@@ -123,6 +123,10 @@ bool Value::GetAsList(ListValue** out_value) {
   return false;
 }
 
+bool Value::GetAsList(const ListValue** out_value) const {
+  return false;
+}
+
 Value* Value::DeepCopy() const {
   // This method should only be getting called for null Values--all subclasses
   // need to provide their own implementation;.
@@ -866,6 +870,12 @@ bool ListValue::GetAsList(ListValue** out_value) {
   return true;
 }
 
+bool ListValue::GetAsList(const ListValue** out_value) const {
+  if (out_value)
+    *out_value = this;
+  return true;
+}
+
 ListValue* ListValue::DeepCopy() const {
   ListValue* result = new ListValue;