[core] move SharedSQLiteCache::get to SQLiteCache::getShared

platform/default/default_file_source.cpp

@@ -22,7 +22,7 @@ class DefaultFileSource::Impl {
 public:
     Impl(const std::string& cachePath, const std::string& assetRoot)
         : assetFileSource(assetRoot),
-          cache(SharedSQLiteCache::get(cachePath)),
+          cache(SQLiteCache::getShared(cachePath)),
           onlineFileSource(cache.get()) {
     }
 

platform/default/sqlite_cache.cpp

@@ -472,7 +472,7 @@ void SQLiteCache::Impl::refresh(const Resource& resource, Seconds expires) {
     }
 }
 
-std::shared_ptr<SQLiteCache> SharedSQLiteCache::get(const std::string &path) {
+std::shared_ptr<SQLiteCache> SQLiteCache::getShared(const std::string &path) {
     std::shared_ptr<SQLiteCache> temp = masterPtr.lock();
     if (!temp) {
         temp.reset(new SQLiteCache(path));
@@ -482,6 +482,6 @@ std::shared_ptr<SQLiteCache> SharedSQLiteCache::get(const std::string &path) {
     return temp;
 }
 
-std::weak_ptr<SQLiteCache> SharedSQLiteCache::masterPtr;
+std::weak_ptr<SQLiteCache> SQLiteCache::masterPtr;
 
 } // namespace mbgl

src/mbgl/storage/sqlite_cache.hpp

@@ -20,6 +20,8 @@ template <typename T> class Thread;
 
 class SQLiteCache : private util::noncopyable {
 public:
+    static std::shared_ptr<SQLiteCache> getShared(const std::string &path = ":memory:");
+
     SQLiteCache(const std::string &path = ":memory:");
     ~SQLiteCache();
 
@@ -35,15 +37,6 @@ public:
 
 private:
     const std::unique_ptr<util::Thread<Impl>> thread;
-};
-
-class SharedSQLiteCache : util::noncopyable {
-public:
-    static std::shared_ptr<SQLiteCache> get(const std::string &path = ":memory:");
-
-private:
-    SharedSQLiteCache() {}
-
     static std::weak_ptr<SQLiteCache> masterPtr;
 };