[android] Introduce RunLoop based on Looper

Also implement a Timer and AsyncTask based on Android's Looper.

1 files changed, 2 insertions, 1 deletions

diff --git a/include/mbgl/util/run_loop.hpp b/include/mbgl/util/run_loop.hpp
index 4e25caf554..d3a61d4186 100644
--- a/include/mbgl/util/run_loop.hpp
+++ b/include/mbgl/util/run_loop.hpp
@@ -107,6 +107,8 @@ public:
         return std::make_unique<WorkRequest>(task);
     }
 
+    class Impl;
+
 private:
     MBGL_STORE_THREAD(tid)
 
@@ -175,7 +177,6 @@ private:
     Queue queue;
     std::mutex mutex;
 
-    class Impl;
     std::unique_ptr<Impl> impl;
 };