aw: Skip hardware onDraw when visible rect is empty

android_webview/browser/browser_view_renderer.cc

Index: android_webview/browser/browser_view_renderer.cc
diff --git a/android_webview/browser/browser_view_renderer.cc b/android_webview/browser/browser_view_renderer.cc
index d9d3d0b1e18ab06b1eafcec9a9d45d6fd66dc6a8..d6fd5362b0662b47d75090dfbce2dca4cab33aad 100644
--- a/android_webview/browser/browser_view_renderer.cc
+++ b/android_webview/browser/browser_view_renderer.cc
@@ -264,6 +264,9 @@ bool BrowserViewRenderer::OnDrawHardware(jobject java_canvas) {
   if (!compositor_)
     return false;
 
+  if (last_on_draw_global_visible_rect_.IsEmpty())
+    return client_->RequestDrawGL(java_canvas, false);
+
   if (!hardware_enabled_) {
     hardware_enabled_ = compositor_->InitializeHwDraw();
     if (hardware_enabled_) {