aw: Invalidate view on hardware teardown

android_webview/native/aw_contents.cc

Index: android_webview/native/aw_contents.cc
diff --git a/android_webview/native/aw_contents.cc b/android_webview/native/aw_contents.cc
index e38fd5e1fc4131ffcba3c909295bde4f6367611a..4f6a069dcd823eec41315062f881b63569e9ba97 100644
--- a/android_webview/native/aw_contents.cc
+++ b/android_webview/native/aw_contents.cc
@@ -899,6 +899,11 @@ void AwContents::OnDetachedFromWindow(JNIEnv* env, jobject obj) {
 void AwContents::ReleaseHardwareDrawIfNeeded() {
   InsideHardwareReleaseReset inside_reset(&shared_renderer_state_);
 
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (!obj.is_null())
+    Java_AwContents_invalidateOnFunctorDestroy(env, obj.obj());
+
   bool hardware_initialized = browser_view_renderer_.hardware_enabled();
   if (hardware_initialized) {
     bool draw_functor_succeeded = RequestDrawGL(NULL, true);