Explicitly ShutdownOnUIThread the HostContentSettingsMap when destroying the Profile.

base/values.h

Index: base/values.h
diff --git a/base/values.h b/base/values.h
index 43894d15c2b7ed7ff75a478b7194110624a4c02a..a00a17c3c24358f1bd8fd103b609125b94abe2ce 100644
--- a/base/values.h
+++ b/base/values.h
@@ -94,6 +94,7 @@ class BASE_API Value {
   virtual bool GetAsString(std::string* out_value) const;
   virtual bool GetAsString(string16* out_value) const;
   virtual bool GetAsList(ListValue** out_value);
+  virtual bool GetAsList(const ListValue** out_value) const;
 
   // This creates a deep copy of the entire Value tree, and returns a pointer
   // to the copy.  The caller gets ownership of the copy, of course.
@@ -427,6 +428,7 @@ class BASE_API ListValue : public Value {
 
   // Overridden from Value:
   virtual bool GetAsList(ListValue** out_value);
+  virtual bool GetAsList(const ListValue** out_value) const;
   virtual ListValue* DeepCopy() const;
   virtual bool Equals(const Value* other) const;