AndroidOverlay implementation using Dialog.

gpu/ipc/common/gpu_surface_tracker.h

Index: gpu/ipc/common/gpu_surface_tracker.h
diff --git a/gpu/ipc/common/gpu_surface_tracker.h b/gpu/ipc/common/gpu_surface_tracker.h
index 6d372712521397e6e77bd9d9160d1e7888dbfdcd..4aa926bf11209bd644165516ce44c5cae624c060 100644
--- a/gpu/ipc/common/gpu_surface_tracker.h
+++ b/gpu/ipc/common/gpu_surface_tracker.h
@@ -39,7 +39,12 @@ class GPU_EXPORT GpuSurfaceTracker : public gpu::GpuSurfaceLookup {
       gpu::SurfaceHandle surface_handle) override;
 
 #if defined(OS_ANDROID)
+  // Register |j_surface| with ID |surface_id|, which must be not in use.
   void RegisterViewSurface(int surface_id, jobject j_surface);
+
+  // Register |j_surface| with a new surface ID and return the ID.
+  int RegisterViewSurface(jobject j_surface);
+
   void UnregisterViewSurface(int surface_id);
   gl::ScopedJavaSurface AcquireJavaSurface(int surface_id) override;
 #endif