Update SupportsUserData uses with unique_ptr.

base/supports_user_data.h

Index: base/supports_user_data.h
diff --git a/base/supports_user_data.h b/base/supports_user_data.h
index 233ce38ce2d952430f3f0b0fb3984323c0d00e3e..56522e263932329b01c04f9708eda6d17802027b 100644
--- a/base/supports_user_data.h
+++ b/base/supports_user_data.h
@@ -37,10 +37,7 @@ class BASE_EXPORT SupportsUserData {
   // Multiple user data values can be stored under different keys.
   // This object will TAKE OWNERSHIP of the given data pointer, and will
   // delete the object if it is changed or the object is destroyed.
-  // TODO: remove the raw ptr version of SetUserData once everything uses
-  // the unique_ptr version, see crbug.com/690937.
   Data* GetUserData(const void* key) const;
-  void SetUserData(const void* key, Data* data);
   void SetUserData(const void* key, std::unique_ptr<Data> data);
   void RemoveUserData(const void* key);