Don't submit empty frames in android webview

android_webview/browser/hardware_renderer.cc

Index: android_webview/browser/hardware_renderer.cc
diff --git a/android_webview/browser/hardware_renderer.cc b/android_webview/browser/hardware_renderer.cc
index ffb2a6f9ce1897f571ebc32cd8b020e0e032d771..42bad7c11cdc1128fad9a9aa325c7bac7b77cb83 100644
--- a/android_webview/browser/hardware_renderer.cc
+++ b/android_webview/browser/hardware_renderer.cc
@@ -166,12 +166,6 @@ void HardwareRenderer::AllocateSurface() {
 void HardwareRenderer::DestroySurface() {
   DCHECK(child_id_.is_valid());
 
-  // Submit an empty frame to force any existing resources to be returned.
-  cc::CompositorFrame frame;
-  // We submit without a prior BeginFrame, so acknowledge a manual BeginFrame.
-  frame.metadata.begin_frame_ack =
-      cc::BeginFrameAck::CreateManualAckWithDamage();
-  support_->SubmitCompositorFrame(child_id_, std::move(frame));
   surfaces_->RemoveChildId(cc::SurfaceId(frame_sink_id_, child_id_));
   support_->EvictFrame();
   child_id_ = cc::LocalSurfaceId();