EglRenderer: Trigger framelisteners even on dropped frames by default.

webrtc/sdk/android/api/org/webrtc/SurfaceViewRenderer.java

Index: webrtc/sdk/android/api/org/webrtc/SurfaceViewRenderer.java
diff --git a/webrtc/sdk/android/api/org/webrtc/SurfaceViewRenderer.java b/webrtc/sdk/android/api/org/webrtc/SurfaceViewRenderer.java
index 866ca59d68b335773ac21095b00d306f07891080..2a9d04f0460bbf5fdbeff16b157780ffdefc0186 100644
--- a/webrtc/sdk/android/api/org/webrtc/SurfaceViewRenderer.java
+++ b/webrtc/sdk/android/api/org/webrtc/SurfaceViewRenderer.java
@@ -111,21 +111,23 @@ public class SurfaceViewRenderer
   /**
    * Register a callback to be invoked when a new video frame has been received.
    *
-   * @param listener The callback to be invoked.
+   * @param listener The callback to be invoked. The callback will be invoked on the render thread.
+   *                 It should be lightweight and must not call removeFrameListener.
    * @param scale    The scale of the Bitmap passed to the callback, or 0 if no Bitmap is
    *                 required.
    * @param drawer   Custom drawer to use for this frame listener.
    */
   public void addFrameListener(
-      EglRenderer.FrameListener listener, float scale, final RendererCommon.GlDrawer drawer) {
-    eglRenderer.addFrameListener(listener, scale, drawer);
+      EglRenderer.FrameListener listener, float scale, RendererCommon.GlDrawer drawerParam) {
+    eglRenderer.addFrameListener(listener, scale, drawerParam);
   }
 
   /**
    * Register a callback to be invoked when a new video frame has been received. This version uses
    * the drawer of the EglRenderer that was passed in init.
    *
-   * @param listener The callback to be invoked.
+   * @param listener The callback to be invoked. The callback will be invoked on the render thread.
+   *                 It should be lightweight and must not call removeFrameListener.
    * @param scale    The scale of the Bitmap passed to the callback, or 0 if no Bitmap is
    *                 required.
    */