[core] Promote DefaultFileSource::put to general use.

include/mbgl/storage/default_file_source.hpp

@@ -160,10 +160,20 @@ public:
      * expired while the file source was paused.
      */
     void resume();
+    
+    /*
+     * Insert the provided resource into the ambient cache
+     *
+     * Consumers of the resource will expect the uncompressed version; the
+     * OfflineDatabase will determine whether to compress the data on disk.
+     * This call is asynchronous: the data may not be immediately available
+     * for in-progress requests, although subsequent requests should have
+     * access to the cached data.
+     */
+    void put(const Resource&, const Response&);
 
     // For testing only.
     void setOnlineStatus(bool);
-    void put(const Resource&, const Response&);
 
     class Impl;
 

platform/default/default_file_source.cpp

@@ -302,6 +302,10 @@ void DefaultFileSource::pause() {
 void DefaultFileSource::resume() {
     impl->resume();
 }
+    
+void DefaultFileSource::put(const Resource& resource, const Response& response) {
+    impl->actor().invoke(&Impl::put, resource, response);
+}
 
 // For testing only:
 
@@ -309,8 +313,4 @@ void DefaultFileSource::setOnlineStatus(const bool status) {
     impl->actor().invoke(&Impl::setOnlineStatus, status);
 }
 
-void DefaultFileSource::put(const Resource& resource, const Response& response) {
-    impl->actor().invoke(&Impl::put, resource, response);
-}
-
 } // namespace mbgl